You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, may I know your good name to check the reservation on your name?

USER: My name is Daniel Lopez.

ASSISTANT: Thank you for providing your name, there is no reservation found on your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.