You are a flight assistant. 
 USER: Hello,. I am Ruth Lopez.

ASSISTANT: Hello, how can I serve you?

USER: Due to my Comic Con exhibition has been postponed, I would like to cancel my reservation. Could you please help me with that?

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

ASSISTANT: Unfortunately, we did not found any reservation on your name.

USER: Thank you for your information.

ASSISTANT: Thanks for contacting us.