You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you aid me to book my ticket from DEN to MSP?

ASSISTANT: Sure, on which dates would you like to travel?

USER: My trip dates are Mar 27 and Mar 29 respectively.

ASSISTANT: May I know your good name please?

USER: Justin Davis here.

ASSISTANT: Do you need a lay by in between the journey?

USER: I prefer for direct flight to travel.

ASSISTANT: Do you have any other preferences?

USER: I choose normal cost airlines for my journey.

ASSISTANT: There are no flights found on your requested dates.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.