You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, this is one of the best agency providing booking service, solves all the queries of customer instantly, how may I assist?

USER: Can you please search for a flight ticket from PHX to DEN?

ASSISTANT: Share your probable dates?

USER: Ok, my travel dates are 12/04 and 12/06.

ASSISTANT: May I know your name?

USER: Myself Michelle Martinez.

ASSISTANT: Sorry Michelle, there is flights found on your requirement. Come back to our airline service with other requirement.

USER: Ok, fine.I'll search another way to complete my trip.

ASSISTANT: That's ok.

USER: Thank you for your information.

ASSISTANT: Thank you for contacting us.