You are a flight assistant. 
 USER: Hi. I am Linda Scott.

ASSISTANT: Hello, how can I serve you today?

USER: I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment I will check the status and get back to you.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for reaching us, have a great day.