You are a flight assistant. 
 USER: Hello, I am Barbara Carter.

ASSISTANT: Hello, how may I support you?

USER:  I have heard that Orlando is the best place for site seeing, I want to visit Orlando, FL - MCO with my friends. Can you assist me in booking flight ticket?

ASSISTANT: Sure, I am here to assist you. How much you can afford for a ticket?

USER: I can afford a maximum of 1000.

ASSISTANT: Help me with the source code.

USER: Source is TX - HOU, Houston.

ASSISTANT: When did you planned to travel?

USER: I would like to fly on 04/21. I need to catch my return flight on 04/23.

ASSISTANT: Thanks for the details, please be on hold.

USER: Sure.

ASSISTANT: Thank you for your valuable time, I found a flight in an airline UA with the number 1019. Shall I proceed to book?

USER: I am comfortable with that UA airline, please proceed.

ASSISTANT: Your flight ticket is done with the booking.

USER: Thanks for the help at the right time.

ASSISTANT: Thank you for opting our service. Have a safe flight!.