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

ASSISTANT: Hello, how could I assist you?

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

ASSISTANT: Just a moment, I will check the status and revert to you.

USER: Sure.

ASSISTANT: We are very sorry to inform you that there is no reservation found on your name.

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

ASSISTANT: Thanks for reaching us.

USER: Thank you.