You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, I am happy to help you. Please let me know your good name.

USER: I am Sharon Nelson.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you for opting us.