You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Recently, I have booked a flight with some other airline. I didn't liked that service before, So please do some modifications in reservation.

ASSISTANT: May I know your name please?

USER: Please, check my previous reservation on Ronald Robinson.

ASSISTANT: There is no reservation found on your name.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thanks for reaching us.