You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kathleen Taylor.

ASSISTANT: How may I aid you?

USER: I have to write an exam in my university which is in Phoenix, can you please book a flight ticket for me?

ASSISTANT: Sure, I am gleeful to help you with that. Can you please tell me your travel dates?

USER: Sure, my travel dates that I am planning to move on 11/11 and return back on 11/13.

ASSISTANT: Ok, which airports do you prefer to travel?

USER: Sure, my source region airport code is DFW and my destination region airport code is PHX.

ASSISTANT: Ok, please give me a minute. I will find the flight and get back to you.

USER: Sure, I will wait for your resply.

ASSISTANT: There is no flight available in this route on the dates which you have given.

USER: That's fine, I can ask my friend to help me to reach my location. Thank you for your help.

ASSISTANT: You are welcome. Thank you for choosing us. Have a nice day.

USER: Welcome.