You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Margaret Harris and I want to cancel my recent reservation due to my office meetings.

ASSISTANT: Sure, we are here to help you. Please hold on a moment.

USER: sure.

ASSISTANT: Sorry to inform you that, there is no reservation found on your given name.

USER: No issues, thank you for your service.

ASSISTANT: Thanks for reaching us, have a nice day.