You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Thomas Green, I need to book a flight to CLT from DEN.

ASSISTANT: Sure, I will help you out in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates are 08/01 and 08/03.

ASSISTANT: Hold on for a while.

USER: Make sure that a direct flight for my journey.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.