You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER:  My name is Ronald Hernandez.

ASSISTANT: Thanks for your name, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to say that no reservation was found on your name to change.

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

ASSISTANT: Thank you for reaching our services.