You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Samuel Turner here. My wedding has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, we are here to help you. May I know your name please? Sorry please wait for a while.

USER: Ok.

ASSISTANT: Sorry we did not find any reservation with your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.