You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am William Gonzalez want to visit IAD, can you book a ticket from CLT?

ASSISTANT: Sure, can I have your planned dates please?

USER: Sure, my travelling dates will be 12/24 and 12/26.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: I found a flight for you in Delta airlines with fare 200. Can I proceed?

USER: Yes, proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1006.

USER: Thank you.

ASSISTANT: Thank you for approaching us.