You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Gary Walker.

ASSISTANT: Sorry, there is no reservation on your name.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you.