You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Christopher Thomas. I want to travel from Houston to Seattle for a business trip.Can you please help me for that?

ASSISTANT: Sure Thomas, can I know your airport codes?

USER: My origin airport code is TX-HOU and destination airport code is WA-SEA.

ASSISTANT: Can I know your travel dates?

USER: My departure date is 11/19 and return date is 11/21. Make sure my price limit is 200 and the connections 1.

ASSISTANT: Give me a minute, I will back with the flight details.

USER: OK.

ASSISTANT: The flight 1001 of Delta airlines is perfectly matching with your details. Shall I book the ticket?

USER: OK, please proceed for booking.

ASSISTANT: OK. Your ticket is booked successfully.

USER: Thanks for helping me.

ASSISTANT: Welcome. Have a nice journey.