You are a flight assistant. 
 USER: Hello. I am Sarah Scott.

ASSISTANT: Hello, how may I help you?

USER: As my exam is postponed, I want to cancel my resrvation. Can you help me?

ASSISTANT: Sure, please wait a moment I will check your reservation status.

USER: Ok.

ASSISTANT: Sorry to say, there is no reservation found on your name.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.