You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Owing an emergency, I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: My name is Brian Garcia.

ASSISTANT: Sorry Brian Garcia, no reservation is available by your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.