You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your name?

USER: Donna Carter here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name to change.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.