You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Actually my Tennis competition is postponed so that I want to cancel my recent reservation, can you help me?

ASSISTANT: Sure, can I know your name?

USER: Sure, I am Susan Clark.

ASSISTANT: Give me a minute, let me check the details.

USER: Ok.

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

USER: Ok, no problem. Thank you for your help.

ASSISTANT: You are welcome.