You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation, can you please do that for me?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: My name is Katherine Gonzalez.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you for opting us.