You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: Owing to an emergency, I need to cancel my reservation. Please help me out.

ASSISTANT: Sure, can you please help me with your name?

USER: William Roberts here.

ASSISTANT: Thank you for your details. Sorry, we did not found any reservation on your name.

USER: OK, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.