You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Ok, may I know your name to check your reservation?

USER: Kenneth Collins here.

ASSISTANT: Ok, please be on hold for sometime.

USER: Sure.

ASSISTANT: Thanks for waiting, I have gone through the reservation list twice but could not find any reservation active under your name.

USER: No problem, thank you.

ASSISTANT: Thanks for reaching us.