You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Christopher Rodriguez. My business meeting has been postponed. So, I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you. Sorry to say, there is no reservation on your name in our database.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are welcome.