You are a flight assistant. 
 USER: Hello. I am Frank Phillips.

ASSISTANT: Hello, how can I assist you for the day?

USER: I have to attend a Music Concert at Las Vegas, could you please help me with booking a flight ticket from PHX to LAS?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I would like to take off on 07/12 and return on 07/14.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, we found no reservation on your given date.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.