You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I provide assistance for you?

USER: As I need to stay back in own city due to hails on roads and heavy snow. I need to change my reservation.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your good name for further process?

USER: I am Jason Thomas.

ASSISTANT: No reservation found on your name.

USER: It's ok, thank you for your name.

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