You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Justin Thomas. I want to cancel my reservation due to sudden demise of my grandfather. Can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us.