You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: Can you reserve me a ticket from DEN to PHX?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Feb 11 to 13.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I need a single connecting flight.

ASSISTANT:  For booking, we need your good name. Please mention it.

USER: I am Nancy Wilson.

ASSISTANT: Is there any time concern for you?

USER: My depart and arrival time must be in afternoon.

ASSISTANT: May I know your class preferences?

USER: I am ok with any class.

ASSISTANT: We found a Southwest airline and 1001 is flight number with a fare of 800. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket is confirmed with a business class.

USER: Thank you.

ASSISTANT: Thank you for opting us.