You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today? May I know your good name please?

USER: I have a reservation but sudden changes occurred with the existing reservation. Can you please change my reservation?

ASSISTANT: Sure, please mention your name?

USER: Christine Rodriguez is my name.

ASSISTANT: Ok, please wait for a moment. I will check and revert you.

USER: Sure.

ASSISTANT: We are sorry to inform you that, we did not find any reservation with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Thanks for your information.