You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Benjamin Edwards, want to alter my recent reservation. Please help me out with that.

ASSISTANT: Sure Edwards, I can help you in changing your reservation, let me check for your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry Edwards, I have not found any reservation under your name.

USER: It's ok, not an issue. Anyway, thank you for your help.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you.