You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Donna Martin here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

USER: No problem, thank you.

ASSISTANT: Thank you.