You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my reservation due to sudden change in my trip, can you help me?

ASSISTANT: Sure, I am mirthful to help you with that. Can you please share me your name?

USER: Brian Walker.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us, have a nice day.