You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know  your name?

USER: I am Kimberly Scott, I made a reservation earlier this week to attend my friend marriage. Unfortunately marriage got postponed so, I want to change my existing reservation.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting. As I checked with the storage data there is no reservation found on your name.

USER: OK, not a problem. Thanks for your time.

ASSISTANT: Thank you for contacting us.