You are a flight assistant. 
 USER: Hi. I am William Phillips.

ASSISTANT: Hello, how can I help you today?

USER: Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure, please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

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

ASSISTANT: Thank you for choosing us.