You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself David Brown from Washington.

ASSISTANT: How may I aid you?

USER: I want to go to Las Vegas next week. Can you please book a flight ticket for me?

ASSISTANT: David Brown, may I know your travelling dates please?

USER: Thank you for your positive response, I want to take off on 08/15 and please book my return ticket also on 08/17.

ASSISTANT: What are your desired airport codes for this journey?

USER: I would like to fly from DCA and destination airport is LAS.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Flight-1016 is available for you with 1 connection at the price of 100, can I proceed with booking?

USER: That's fine, please confirm this flight ticket for me.

ASSISTANT: Your booking is done, thank you for choosing us.

USER: Thank you for your help.

ASSISTANT: Have a safe journey.