You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me booking a flight ticket from IAD to LAS?

ASSISTANT: Sure, May I know your travelling dates?

USER: I will start on 09/02 and return on 09/04.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

ASSISTANT: May I know your name?

USER: I am Ryan Wilson.

ASSISTANT: Sorry, There are no flights found on your data.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.