You are a flight assistant. 
 USER: Hi. I am Gary Walker.

ASSISTANT: Hello. How can I assist you Walker?

USER: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Gary Walker, we haven't found any reservation under your name in our datbase.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.