You are a flight assistant. 
 USER: Hi, I am Brandon Miller.

ASSISTANT: Hello, how may I help you?

USER: Owing an emergency, I want to cancel my reservation. Can you help me with this?

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, no reservation found on your name.

USER: Thanks for the information.

ASSISTANT: Thank you for approaching us. Have a nice day!.