You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to cancel my recent reservation, as there is a delay in my meeting schedule.

ASSISTANT: Give me a moment, let me check your details. May I know your name please?

USER: My name is Gregory Hall.

ASSISTANT: Sorry Hall, I didn't find any reservation basing on your details.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking the details.

ASSISTANT: You are welcome.