You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Gregory Brown, I am willing to cancel my reservation. Can you please help me for this?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I will wait for your kind response.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Not a big deal, anyway thank you very much for your service.

ASSISTANT: Thank you for opting us.