You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: William Brown here.

ASSISTANT: How can I assist you?

USER: Due to an emergency,  I need to cancel my reservation. Can you please help me with it?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: No reservation found by name William Brown.

USER: Ok, not an issue.

ASSISTANT: Thanks.

USER: Thank you for your information.