You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Green, there is no reservation found as per your name to change it.

USER: No problem, thank you.

ASSISTANT: You are welcome.