You are a flight assistant. 
 USER: Hi, I am Brenda Martinez.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Could you please help me to book an economy class ticket to Washington DC-IAD?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your take off airport code?

USER: My boarding point is San Francisco, CA-SFO.

ASSISTANT: Could you please help me with your travel dates?

USER: I would like to start on 05/15 and my return date will be on 05/17.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is AA with price 100.

USER: Everything is fine, you can proceed with the booking.

ASSISTANT: Your booking is done and flight number is 1008.

USER: Thank you for quick response in booking.

ASSISTANT: Thanks for reaching us.