You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how exactly I can serve you the best today?

USER: I have planned to book a flight from DFW to reach Phoenix, so please help me in booking a flight.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you assign me your trip dates?

USER: Sure, my trip dates are on Apr 23rd to 25th.

ASSISTANT: Do you need any flag stop in your journey?

USER: Yes, I need it.

ASSISTANT: Do you have any airline preference?

USER: I need a normal-cost airline.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: We are happy to inform you that, there is a connecting flight with Delta Airlines. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: On what name, I have to book the flight ticket?

USER: Sure, my name is Richard Scott.

ASSISTANT: Your seat has been reserved with 1002 flight number in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.