You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to spend some more time with my parents, can you help me in changing the reservation?

ASSISTANT: Sure, could you provide me your name for further process?

USER: My name is Paul Lewis.

ASSISTANT: Sorry Paul, no active reservations in our database to find.

USER: That's fine, thank you for the information.

ASSISTANT: Do you need any other help?

USER: No, thank you.

ASSISTANT: Ok, thank you for contacting us.

USER: Welcome.