You are a flight assistant. 
 USER: Hi, I am Donald Garcia.

ASSISTANT: Hello,. How can I assist you today?

USER: I have planned to visit Houston Zoo with my children, so I need to book  a flight ticket on 06/22. Will you assist me in booking a ticket from Austin, TX - AUS?

ASSISTANT: Sure, we are here to assist you. When your willing to come back?

USER: I would like to return on 06/24.

ASSISTANT: Help me with your destination airport.

USER: My destination point is TX - IAH.

ASSISTANT: There is a flight that matches your request. There is a flight with 1012 of Spirit airline. May I reserve?

USER: Ok, please proceed.

ASSISTANT: Reservation of your ticket has been done.

USER: Thank you.

ASSISTANT: Thank you for opting us.