You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, may I know your good name?

USER: My name is Debra Edwards.

ASSISTANT: There is no reservation found on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.