You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Myself Jeffery Roberts. For some issues I want to change my reservation, can you please help me?

ASSISTANT: Please give me a minute, I will check the status of your reservation.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok.

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

USER: Thank you for the information.