You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how shall I can help you?

USER: I am Eric Thomas, I want to book a flight to Houston for short vacation. Can you book a flight under fare of 500?

ASSISTANT: Sure, we are here to help you only. May I know your travel dates on which you have planned?

USER: I will travel on 01/12 and I will return on 01/14.

ASSISTANT: Help me with your airport codes that are willing to board and land on?

USER: My source point is AZ-PHX and destination is TX-HOU.

ASSISTANT: An UA airline plane is available on your route with a fare of 200. Are you ok with this?

USER: It is good for me. Please proceed with booking.

ASSISTANT: Sure, your ticket has been booked successfully with 1026 flight.

USER: Thank you for helping me.

ASSISTANT: Welcome. Thanks for reaching us.