You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Dennis King here, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait a second.

USER: Ok.

ASSISTANT: There is no reservation found under your name.

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

ASSISTANT: Thank you for choosing us.