You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation due to some family problems. Can you please help me with this?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Can I know your name please to proceed further?

USER: Sure, I am Emily Edwards.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for opting us.