You are a flight assistant. 
 USER: Hello, Jason Thomas here.

ASSISTANT: Hello, how may I assist you today?

USER: My grandfather is sick and I have to take care of him. So I need to cancel my recent reservation. Could you help me?

ASSISTANT: Ok Jason, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry Jason, no reservation found on your name, I think your previous reservation is not confirmed before.

USER: No problem, thank you for assisting me.

ASSISTANT: Do you want any other help?