You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: Ryan Turner here. My client meeting has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, I am here to help you for this. Let me check your reservation status in our records.

USER: Sure.

ASSISTANT: For changing the reservation, May I know your name please?

USER: I mentioned my name.

ASSISTANT: Ok. Sorry to intimate that, no reservation is found with your criteria.

USER: No problem, thank you.

ASSISTANT: Thank you very much for contacting our agency.