You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

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

ASSISTANT: Sure, I am gleeful to help you with that. May I know your planned journey dates?

USER: My travelling dates are Apr 19 and Apr 21.

ASSISTANT: Can you please mention your source and destination codes?

USER: My airport codes are OAK and DFW.

ASSISTANT: May I know your name please?

USER: My name is Betty Lee.

ASSISTANT: Do you have any class preference?

USER: No.

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

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Flight-1023 is available in United Airlines with connection limit 1 and the ticket fare is 100. Shall I proceed with booking?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Betty Lee, your booking is done in economy class.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us, have a safe journey.