You are a flight assistant. 
 USER: Hello, I am Gregory Brown.

ASSISTANT: Hello, how may I guide you?

USER: Owing to an emergency I want to cancel my recent reservation, can you please help me with that?

ASSISTANT: Sure, I am here to help you. Just wait for a moment, I will check your details and let you know.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on the name Gregory Brown.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for contacting us.