You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you now?

USER: I have to go Houston in this month for my upcoming film shooting purpose, can you please book a flight ticket from IAD to HOU?

ASSISTANT: Sure, I am happy to help you. On which dates you are planning to go and return?

USER: Thanks, my departure date is 04/09 and please book my return ticket also on 04/11.

ASSISTANT: May I know your name?

USER: Sure, my name is Robert Turner.

ASSISTANT: A flight in UA airline is available with fare 200 for you. Can I book it?

USER: Please proceed.

ASSISTANT: Ok, your booking has been made successfully with flight 1018.

USER: Thank you for your help.

ASSISTANT: Thanks for approaching us, have a pleasant journey.