You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want change my reservation which was done last week. Can you help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: My name is Jennifer Turner.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.