You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I want to cancel my reservation. due to some issue.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Here, I found your reservation and it is successfully cancelled.

USER: It's ok, thank you for your information.

ASSISTANT: May I know your name?

USER: My name is Brian Hill.

ASSISTANT: Thank you for reaching us.

USER: Welcome.