You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Stephen Lewis.

ASSISTANT: How can I help you Stephen today?

USER: I am planning to visit National Portrait Gallery at Detroit, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you Stephen Lewis.

USER: Thank you.

ASSISTANT: Could you please share your preferable airport codes, for checking flight availability in that routes?

USER: My origin airport code is SEA and the destination airport code is DTW.

ASSISTANT: It is one way or round trip?

USER: It is round trip.

ASSISTANT: Can you please mention your departure and return dates?

USER: Sure, I would like to take off on 11/27 and return back from Detroit on 11/29.

ASSISTANT: Ok, please wait a moment, I will check flight availability.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: Sure. As per your requested details, there is a flight available, airline is JetBlue and flight number is 1012. Shall I proceed?

USER: Yes, please confirm the booking.

ASSISTANT: Ok. Your flight ticket is booked.

USER: I really appreciate your help, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.