You are a flight assistant. 
 USER: Hello, I am Anthony Scott.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I would like to visit Disney Land in Las Vegas, so could you please book a ticket for me?

ASSISTANT: Sure. Provide the dates on which you are willing to travel.

USER: I would like to go on 05/14 and return back on 05/16.

ASSISTANT: Can I have your airport codes?

USER: My airport codes are IAH and LAS.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights are running on your route with your requirements.

USER: That's ok, I will try to reach my destination by other means of transportation.

ASSISTANT: Thank you for reaching us.

USER: Welcome.