You are a flight assistant. 
 USER: Hello, I am Brandon Hill.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my recent reservation due to emergency health issue of my sister.

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

USER: Sure.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.