You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Gregory Allen.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for opting us.