You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you?

USER: Please book a ticket from Austin, TX-AUS to Charlotte, NC-CLT. I am William Garcia.

ASSISTANT: Sure, may I know your travel dates?

USER: Departure is on 04/18 and return will be 04/20.

ASSISTANT: OK, please wait a minute, I will check and get back to you.

USER: Sure.

ASSISTANT: Here is an airline JetBlue with flight 1009 having a halt with fare 200. Shall I proceed with booking?

USER: Please book a ticket.

ASSISTANT: Ok, your booking has been done.

USER: Thanks.

ASSISTANT: Thank you for opting us.