You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Gregory Robinson from Seattle.

ASSISTANT: Yes, Robinson.

USER: I have to go to Washington next week for attending a business meeting there, can you please book a flight ticket for me?

ASSISTANT: Sure, I'll definitely help you with that. May I know your travel dates please?

USER: Thank you for accepting my request, I want to take off on 12/07 and please confirm my return ticket also on 12/09.

ASSISTANT: Ok, can you please help me with your airport codes?

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

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Frontier airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: I am comfortable with this flight, please proceed.

ASSISTANT: Your ticket has been booked with flight-1009, have a safe journey.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.