You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Dennis Collins, I want to cancel my ticket as my plan to meet my brother is cancelled. Can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, thank you for the details.

ASSISTANT: Thank you for reaching us.