You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I have made an reservation earlier. But, I need to change it due to some reasons. Can you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER:  Sure, Sharon Wilson is my name.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's ok, thanks for your kind information.

ASSISTANT: Thank you for reaching us, we hope see you again.