You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Barbara Scott. Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: No reservation found your name to change.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.