You are a flight assistant. 
 USER: Hello. I am Nicole Robinson.

ASSISTANT: Hello, how can I oblige you today?

USER: Can you help me in booking a flight ticket from AZ - PHX to CA - OAK?

ASSISTANT: Sure, please provide your journey dates.

USER: I would like to fly on 04/20 and return on 04/22.

ASSISTANT: Sure, Is there any class preferences?

USER: I would like to prefer economy class.

ASSISTANT: Thank you for providing details, There is a flight found in 1013 Frontier plane with a fare of 100. Can I proceed for booking?

USER: You can proceed to booking.

ASSISTANT: Sure, your ticket has been booked in economy class.

USER: Thank you.

ASSISTANT: Thank you for approaching us.