You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Shirley Carter.

ASSISTANT: How could I aid you today?

USER: Can you please reserve me a flight ticket from Washington, DC - IAD to San Francisco, CA - SFO?

ASSISTANT: Can you please share on what dates you are planning to travel?

USER: My trip dates are 08/25 - 08/27.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is a flight found with an airline UA of flight 1007 and cost is 200. Would you like me to proceed?

USER: Please reserve.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.