You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Joshua Parker. I want to cancel my recent reservation due to cancel of my client meeting. Can you help me in cancel reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your given name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.