You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I assist you?

USER: I have some personal matters that need fixing so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, May I know your name?

USER: My name is Gary Lopez.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no issues. Thanks for your assistance.

ASSISTANT: Thank you for availing us.