You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Janet Moore this side, I am planning to expand my business to Seattle. Can you help me to book a ticket?

ASSISTANT: Sure, may I know your airport codes please?

USER:  I am planning to start from DTW and to reach SEA.

ASSISTANT: Ok, can you help me providing your dates of journey please?

USER: I am planning to take off on 12/19 and return on 12/21.

ASSISTANT: Ok, hold on for a moment. Let me check. I found a flight for you with AA airline and it costs you 200. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been booked with 1015 flight number.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us, have a safe flight.

USER: Welcome.