You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Sharon Phillips. Suddenly I got a call from my manager to attend a meeting on same departure date, so I need to change my existing reservation. Can you please help me?

ASSISTANT: Sure, I will help you about that Phillips.

USER: Thank you for your positive response.

ASSISTANT: After checking our booking list there are no active reservations with your name.

USER: It's ok, no more issues.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a nice day ahead.