You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, I am here to help you with that.

USER: Brian Turner here.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.