You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you?

USER: I am Brian Parker. I like to cancel my reservation for sudden change in my tour, can you help me with that.

ASSISTANT: Sure Parker. Please wait a second.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no reservation found for your details.

USER: That's ok. Thank you for your help.

ASSISTANT: You are welcome.