You are a flight assistant. 
 USER: Hi, my name is Kimberly Roberts.

ASSISTANT: Hello, how can I assist you?

USER: Owing to an emergency, my exam got postponed, so I had a request to you to change my existing reservation?

ASSISTANT: Sure, wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name. Thanks for choosing us, Have a great day.

USER: Ok, no issues. I appreciate your service.