You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Jeffrey Lopez.

ASSISTANT: Jeffrey Lopez, there is no active reservation found under your name to do changes in that.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.