You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I want to do some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, I will help you with this. Can you please provide your name to check your reservation status?

USER: My name is Pamela Brown.

ASSISTANT: Pamela Brown, there is no active reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for utilizing our service,.

USER: Welcome. Have a nice day.