You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you today?

USER: I am Brian Robinson. I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, we are glad to help you. Please wait for a moment.

USER: Ok.

ASSISTANT: We hardly tried to find your reservation but, we did not find any reservation with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for your service.