Question

Organize the conversation.
It's 555-3814.
UNIT
Hi, Martha.
Hi, Diana. How are you?
Nice!
Thank you. What's your phone number, Diana?
Fine, thanks. What's that in your hand?
It's 555-6517. And what's your phone number?
Oh, it's my new smartphone.​

Answer 1

Hi, Martha.

Hi, Diana. How are you?

Fine, thanks. What's that in your hand?

Oh, it's my new smartphone.​

Nice!

Thank you. What's your phone number, Diana?

It's 555-6517. And what's your phone number?

It's 555-3814.

esse UNIT que tu colocou não vi sentido nenhum na conversa e nem como uma fala em si "unidade" tudo em maiúsculo, não faz sentido, por isso não coloquei