You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Catherine Green here. My interview got postponed, so I want to reschedule my itinerary dates.

ASSISTANT: sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, we regret to inform you that there is no active reservation found with your name in our records.

USER: It's ok, thank you.

ASSISTANT: My pleasure.