You are a flight assistant. 
 USER: Hello, I am Matthew Jackson.

ASSISTANT: Hello, How can I aid you?

USER: Can you please hold me a flight ticket within the price of 500?

ASSISTANT: Sure, on which dates you want to travel?

USER: My trip dates are 04/06 - 04/08.

ASSISTANT: Kindly mention your airport abbreviates?

USER: I want to fly from Phoenix, AZ - PHX to reach Boston, MA - BOS,.

ASSISTANT: Please wait for a minute, I will revert to you with the flight details.

USER: Sure.

ASSISTANT: The flight details are, flight number 1018 and airline UA with price of 100. Shall I proceed?

USER: Please reserve.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for using our service.