Hi eveybody,
I'd like to know how to tell someone to trade something... for example...if I meet a person and I want to give him/her my phone number and I want to get his/her number too, how could I say? Could you suggest me some correct expressions? Do I have to use some particular phrasal verbs?

Moreover, could you suggest me some links where I can find some examples of typical conversation among people?

Thanks in advice.