You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Davis.

ASSISTANT: Davis, how can I assist you today?

USER: I would like to change my reservation as I am moving to my native place, can you please help me out?

ASSISTANT: Sure, I can do that. Let me know your reservation status.

USER: Thank you.

ASSISTANT: Davis, I did not find any reservation under your name in our database.

USER: Ok no problem, thank you for your services.