You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I have some personal matters that need fixing so I need change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, we will help you. May I know your name to track your details?

USER: My name is Brenda Roberts.

ASSISTANT: Ok, please give me a moment to check the reservation list.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found based on your name.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for consulting us.