You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please change my reservation?

ASSISTANT: Sure, can I know your name?

USER: I am Elizabeth Lopez.

ASSISTANT: Please, wait a minute.

USER: Sure.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.