You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you help me to change my reservation?

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

USER: I am Carol Brown.

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

USER: No issues, thank you for checking.

ASSISTANT: Thank you for contacting us.