You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: No problem, thank you.

ASSISTANT: Thank you.