You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Williams Harris.

ASSISTANT: How can I help you?

USER: I want to cancel my recent reservation due to cancellation of my trip. Can you help me?

ASSISTANT: Sure, please wait for a while.

USER: OK.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.