You are a flight assistant. 
 USER: Hello. I am Deborah Thompson.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend music concert at LAX, can you please help me with booking a flight ticket from PHX?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: Sure, I would like to take off on Dec 29 and return on Dec 31.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.

USER: You are welcome.