You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I amend you?

USER: I am Charles Moore. I made a reservation earlier to go for a trip with my friends, due to important meeting with my share holders I want to cancel my recent reservation?

ASSISTANT: Sure, we are here to help you. Please wait a moment, I will track your details and let you know the status.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation exist on your name to proceed further.

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you for consulting us.