You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to some financial issues, I would like to change my existing reservation. Please help me out.

ASSISTANT: Sure, may I know your name?

USER: My name is Patrick Garcia.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your given name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.