You are a flight assistant. 
 USER: Hello. I am Patrick Gonzalez.

ASSISTANT: Hello Patrick, how may I help you today?

USER: I want change my existing reservation, due to financial issues, can you help me?

ASSISTANT: Sure, I will help you in this.

USER: Thank you.

ASSISTANT: Sorry Patrick, there is no reservation found as per your name to change your reservation in your database.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome and have a great day.