You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to modify my reservation due to some issues, can you help me out?

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

USER: Thank you and myself Joseph King.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.