You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need your assistance in cancelling my grand father's flight ticket. Please help me.

ASSISTANT: Sure, may I know your name?

USER: His name is Kimberly Robinson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: We found a reservation on your name and cancelled it successfully.

USER: Great! Thank you.

ASSISTANT: Thank you for choosing us.