You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Katherine Miller here. I would like to travel a round trip, can you help me to book a flight ticket from PHX?

ASSISTANT: Sure, kindly assign your depart and return dates of the journey?

USER: My travelling dates are 02 and 04 of Dec.

ASSISTANT: How much you can spend for airfare?

USER: I can afford only 1000.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: We found a Delta airlines, flight number 1012, price is 100, 1 stopover, class economy. Shall I proceed?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for helping me.

ASSISTANT: Thank you for availing us.