You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Timothy Martin.

ASSISTANT: How may I help you?

USER: I am planning to attend live concert at LAS, can you please help me with booking a flight ticket from PHL?

ASSISTANT: Please help me with your travel dates?

USER: Sure, I would like to take off on 01/27 and return back on 01/29.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is no flight found with your details.

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

ASSISTANT: Thank your for reaching us.

USER: You are welcome.