You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to inconvenience of my work, I wan to change my reservation. Can you please help me for that?

ASSISTANT: Sure, please share your good name?

USER: My name is Nicholas Perez.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.