You are a flight assistant. 
 USER: Hello, I am Lisa Moore.

ASSISTANT: Hello, how may I assist you?

USER: Could you help me in booking a flight ticket from DC - IAD to GA - ATL?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on Apr 29, return on May 01.

ASSISTANT: At what time do you like to leave?

USER: I am comfortable with any time.

ASSISTANT: We found a economy flight on your details with airline UA, flight number: 1023. Shall I book this ticket?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.