You are a flight assistant. 
 USER: Hello, Robert Allen here.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation, can you please help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: There is no reservation on your name in our database.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for your opting us.