You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: David Green here, I am willing to cancel my reservation because my schedule got cancelled.

ASSISTANT: Sure, please give me a moment to check your details.

USER: Ok, sure.

ASSISTANT: No reservation found on your name. Sorry for inconvenience.

USER: Not an issue, anyway thank you for the help.

ASSISTANT: Thank you for choosing us.