You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are expecting from our service?

USER: Samuel Anderson here. I have planned to take part in Boston marathon, could you book a ticket from Denver?

ASSISTANT: Sure, I am happy to be your guide in booking your flight ticket. Please provide your respective airport codes where you have planned to start your journey and take off region.

USER: My airport codes are DEN and BOS.

ASSISTANT: Could you please let me know your planned dates of your journey?

USER: My itinerary dates are 04/02 and 04/04.

ASSISTANT: Please be on hold for sometime in mean while I will get back to you with the suitable flight for your journey.

USER: Sure, take your time.

ASSISTANT: As per your requirements, there is a flight with a single connected flight having a ticket fare of 100 which is provided by Delta airlines. Would you like to book this flight for your journey?

USER: Go ahead to book my ticket.

ASSISTANT: I have booked your flight ticket with the flight 1025. Have a safe journey.

USER: Thank you for your expeditious service.

ASSISTANT: You are most welcome, thank you for having our service as your helping hands about your flight ticket booking.