You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please help me to cancel my recent reservation.

ASSISTANT: Sure, can I know your name?

USER: Dorothy Robinson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.