You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Please help me to book a flight ticket from LAS  to MSP.

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My travel dates are from Jan, 16 to Jan, 18.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name to book the flight ticket?

USER: I am Sharon Young.

ASSISTANT: Is there any other preferences do you have?

USER: No.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us, have a great day.