You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Actually my exam is postponed so that I want to cancel my recent reservation, could you help me?

ASSISTANT: Sure, may I know your name please?

USER: Yes, I am Jerry Brown.

ASSISTANT: Ok Jerry, please wait for a moment to check.

USER: Ok, sure.

ASSISTANT: Sorry Jerry, there is no reservation found as per your name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you, for contacting us.