You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book the ticket from DEN to MSP? As I'm planning to visit Minneapolis.

ASSISTANT: Please let me know your travelling dates?

USER: Sure, my planned departure and return travel dates are 30th April and 2nd May.

ASSISTANT: Is there any airline preference?

USER: I'm ok with any airlines.

ASSISTANT: Do you have any preferences?

USER: Yes, I need direct flight.

ASSISTANT: May I know your name?

USER: My name is Mary Jones.

ASSISTANT: Direct flight is found with Southwest airlines for price 100. Shall I book a ticket?

USER: That's fine for me, you can proceed for booking.

ASSISTANT: Your ticket is booked having flight number 1010.

USER: Thank you so much for your help.

ASSISTANT: Thank you. Have a nice day ahead!.