Learn English – Is it correct to say “no need of thanks”

1. Been is widely used in a number of British and American dialects as an abbreviated form of present perfect have been/has been. In some cases the form is established as a dialect standard, in other cases it represents a severe elision of have been—/v/ and /b/ are pronounced at exactly the same point in the mouth, so it /v/ very readily disappears in the following /b/.

   • Note that been is not used this way in negative statements.
   • Note that in some dialects been is also used as an alternative past form.

   All of these uses are non-standard and should not be emulated by learners in any register, even the most casual speech: speakers of a dialect in which one of these uses is standard may suspect you of mocking their speech. Stick to the standard forms.

2. Dialects which employ ain't use it for both {is / are / am} not and {have / has} not. Ain't been thus represents haven't been or, as in your example, hasn't been.

Well, the first thing I must point out is that neither of these sentences are correct without an 'a' in them.

It was a pleasure to meet/meeting you.

As for whether you should use "to meet" or "meeting", it makes no difference. The meaning and usage is completely interchangeable.

I would not recommend using "to have met you" except for specific situations (like thanking a host). The meaning is subtly different. The first sentence means "I enjoyed meeting you." But the second means "I enjoyed that I got to meet you." It doesn't say anything about whether the actual meeting was a pleasure, although this is implied.