You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Charles Phillips.

ASSISTANT: How may I assist you?

USER: I would like to cancel my reservation, could you help me out?

ASSISTANT: Sure, I am here to help you out.

USER: Ok.

ASSISTANT: Charles Phillips, we haven't found any reservation under your name in our database.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.