You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Hernandez.

ASSISTANT: How can I help you?

USER: Can you please help me in booking my flight ticket to DEN from LAS?

ASSISTANT: Let me know your travelling dates.

USER: Sure, my travelling dates are Feb 18 and Feb 20.

ASSISTANT: Do you have any preference?

USER: I need have my return journey in the afternoon.

ASSISTANT: Connecting flight can be booked with airline Delta for price 100 having flight number 1001.

USER: Yes, do proceed with the booking in the flight which you have provided.

ASSISTANT: Ticket is booked.

USER: Thank you for booking my flight ticket with the flight 1001.

ASSISTANT: Thank you.