You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, I am here to aid you. To check the previous reservation, we need your name.

USER: Sure, I am George Lewis.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name to change.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for contacting us.