You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Owing to an urgency, I would like to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, I will help you in this. May I know your name please?

USER: My name is Andrew Hill.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Hill, there is no reservation found as per your name to cancel your reservation in your database.

USER: Ok, not an issue. May be my brother has already cancelled my ticket on behalf of me.

ASSISTANT: Thank you for contacting us.

USER: Thank you for providing information.