You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I am Donald Martin. I need to book a ticket from ORD to PHX, could you help me in doing that?

ASSISTANT: Sure, I am glad to assist you in flight ticket booking and may I know your preferable travel dates?

USER: My travelling dates are 12/06 to 12/08.

ASSISTANT: How much you can afford for your flight ticket?

USER: I can pay you 200.

ASSISTANT: Please be on hold for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there is no flight obtained on your journey dates to book a ticket.

USER: Thank you for the information.

ASSISTANT: It's my pleasure and thank you for consulting our agency.