You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, could you please let me your name?

USER: Carol Adams.

ASSISTANT: Sure. Sorry I didn't found any reservation on your name.

USER: Not a problem, thank you.

ASSISTANT: Thank you for connecting us. Have a safe day.