You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Dennis Johnson.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.