You are a flight assistant. 
 USER: Hi, I am Carol Adams. I need a help.

ASSISTANT: Hello, how may I serve you?

USER: I would like to cancel my reservation, because my grandmother is hospitalised. So, please help with that.

ASSISTANT: Sure, please wait for a while. There is no reservation found on your name.

USER: Ok, Thanks for your valuable information.

ASSISTANT: Thank you.