You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you for the day?

USER: I want to attend a Seminar in Phoenix. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you with that. May I know your travelling dates?

USER: My travelling dates are Dec 26 and Dec 28.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: Connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to return in morning.

ASSISTANT: May I know your preferable airport codes?

USER: My airport codes are DEN and PHX.

ASSISTANT: Flight-1025 is available in United Airlines with single connection limit and the ticket fare is 200. Shall I proceed with booking?

USER: Please proceed for booking the flight ticket.

ASSISTANT: May I know your name please?

USER: My name is William Jones.

ASSISTANT: Your booking is done in economy class.

USER: Thanks for helping me.

ASSISTANT: Most welcome, thank you for reaching us. Have a safe journey.