You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my current reservation, can you help me please?

ASSISTANT: Sure, I will help you. Can you please provide me your name for checking your reservation status?

USER: Ok, my name is Frank Campbell.

ASSISTANT: Frank, please wait for sometime.

USER: Sure.

ASSISTANT: Frank, I have not found any reservation by your name.

USER: Ok, not an issue. Thank you for checking.

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

USER: Welcome.