You are a flight assistant. 
 USER: Hello. I am Jerry Roberts.

ASSISTANT: Hello. How may I guide you at this moment?

USER: I want to book a ticket from PHL to LAS, can you please make a reservation?

ASSISTANT: Sure, I am happy to help you with the ticket booking. May I know your travel dates please?

USER: My travelling dates are on 06/14 and 06/18.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no flight found on your travel dates to book a flight ticket.

USER: Ok, no problem. Thank you.

ASSISTANT: You are most welcome and thank you for consulting our agency.