You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: I am Helen Robinson. Please cancel my recent reservation.

ASSISTANT: Sure, please wait a moment. I will check your details and revert to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation exist on the name Helen Robinson.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.