Act out a similar dialogue. Use the phrases from the language box:
I'm sorry...who is this? / who am I speaking to?
It's me. …! I just got a new phone number.
Hi, …! What's up?
Can you ….?
Sure, but I'm …. now. Can you send me an e-mail?
What's your e-mail address?
It's …
Sorry, can you repeat that? / Can you say that again?