You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jack Brown here.

ASSISTANT: Jack, how can I help you?

USER: I want to visit Houston Zoo with my family. Please book my ticket from CLT to HOU.

ASSISTANT: Sure, can you please tell me your travel dates?

USER: My travel dates are 12/19 and 12/21.

ASSISTANT: There is a flight available with Hawaiian airlines and the ticket fare is 200 only. Is it ok for you?

USER: Please book my ticket.

ASSISTANT: Jack, your ticket is booked and your flight number is 1007.

USER: Thank you.

ASSISTANT: Thank you for choosing us.