You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how  may I assist you?

USER: Unfortunately I have emergency meeting so I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name to check your reservation?

USER: Sure. Myself Donald Davis.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you so much for your kind help.

ASSISTANT: Thank you for opting us.