You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Parker.

ASSISTANT:  How can I help you ?

USER: Owing to an emergency, I need to cancel my business meeting. Can you please cancel my reservation?

ASSISTANT: Sure, please wait I will revert you in  a moment.

USER: Ok.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.