You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Catherine Harris.

ASSISTANT: How can I assist you at this moment?

USER: My business meeting has been postponed, so I would like to cancel my existing reservation.

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Catherine Harris, there is no active reservation found under your name in our database.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.