You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I am want to travel in major airline to DEN, can you help me in that?

ASSISTANT: Sure, I can help you in that. Please let me know your start date and return dates?

USER: I will start on Feb 16th and return on Feb 18th.

ASSISTANT: Ok, from where you want to catch flight to reach DEN?

USER: I want to board from SEA.

ASSISTANT: Please provide your name.

USER: I am Scott Green.

ASSISTANT: We found a direct flight in United airlines under business class seats are available. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Ok, your booking has been made with 1010 flight.

USER: Thank you for assisting me.

ASSISTANT: Thanks for reaching us, have a nice day.