You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Justin Walker.

ASSISTANT: How may I assist you today?

USER: Can you help me with cancelling my reservation ticket?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no active reservation found on your given name.

USER: It's ok, thanks for checking.

ASSISTANT: Thanks for reaching us, have a nice day.