You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Wilson here.

ASSISTANT: Can you please tell me what help that you are looking for?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I am gleeful to help you. Can you please wait a minute?

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you, there is no reservation found with your name to cancel.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome. Thank you for reaching us.