You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: As my visa has been cancelled due to some technical issues, I want to cancel my reservation. Please cancel my ticket on the name of Brian Allen.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your given name.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for connecting with us.