formalitypoliteness
I was living in a hotel for one week, and almost everyday I needed a wake-up call or a shuttle service, and so I would call the reception and say
Can you please arrange a shuttle for tomorrow 9:30 morning?
Can you please arrange a wake-up call for tomorrow 7 am?
I would like to know if this is how native speakers would say it. Would it sound odd, and not said by a native speaker?
Not only is it acceptable, it is also used quite frequently. You can also use other phrases such as "May I help you?", "Do you need help?", or "Would you like some help?". However, "Can I help you?" is probably used more often than other forms.
See Google Ngram Viewer: Can I help you, May I help you, Do you need help, Would you like some help:
In general, it is more polite to ask for help achieving "something" than to ask directly for the "something".
I would like to ask you if it is possible to secure me an internship with a software company.
could be rephrased as
Would you be able to help me secure an internship with a software company?
First, we turn our thought into a question so that it seems less like a demand, and then we ask if it is possible that she might be able to help. This way even if she can't directly find you a position, she may still be able to help by introducing you to someone who can.
I would also rephrase the second and third sentences:
I will have approximately two weeks free between first and second semester, and I would like to use that time to increase my experience.
This isn't English advice, but I can't help but add that in my experience in the US, two weeks is a very short time for an internship. Instead of asking for help getting an internship, you may want to ask for her advice on how to get practical experience during that time.
I was a part time intern for a professor in the Engineering school while I was pursuing my degree, and it worked out well because my work was close to my classes and the university had a process in place for hiring students. A position with an outside company is more difficult to secure because there is a lot more cost in hiring a new intern and they will likely want a longer commitment.
Best Answer
It's always nice to be polite and say "Can you please arrange..." when making a request at a hotel. The people who work there are no different from you, so you should treat them with the respect you'd like to be treated with. Even so, not every native speaker of English will say please. That's a matter of manners, which are learned from one's parents, rather than strictly a matter of language and culture. The world is filled with rude and impolite people who don't say "please" when they ask for things; they just demand what they think they're entitled to because they're the customer, and they believe that "The customer is always right!" Nonsense.