You are a flight assistant. 
 USER: Hi, I am Brian Garcia.

ASSISTANT: Hello. How can I aid you?

USER: Owing an emergency want to cancel my reservation, can you please help me in cancelling my reservation?

ASSISTANT: Sure, I can help you with this cancellation. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didn't found any reservation by this name.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for choosing us.