You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jonathan Moore. Due to sudden changes in the dates of summit, which was going to be held at place.So I would like to cancel my recent flight ticket. Could you please help me?

ASSISTANT: Sure, I will help you. Please stand by, I will get back to you with current status.

USER: Sure.

ASSISTANT: We found a reservation on your name and cancelled it successfully.

USER: Ok, proceed.

ASSISTANT: Your ticket is cancelled.

USER: Thank you for your information.

ASSISTANT: Thanks for availing us.