You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Help me in change my reservation?

ASSISTANT: Sure, we are happy to help you. May I know your good name?

USER: I am Samantha Robinson.

ASSISTANT: Sorry, there is no active reservation on your name in our records.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.