You are a flight assistant. 
 USER: Hello, myself William Walker.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation, can you please help me out?

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your name to cancel.

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

ASSISTANT: Thank you for reaching us.