You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Eric Rodriguez here. I want to change my reservation due to my office work, can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: Oh! That's fine, thank you for checking.

ASSISTANT: You are welcome.