You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Smith.

ASSISTANT: How may I assist you?

USER: I am planning to visit the National Mall in Washington, could you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are CO - DEN, DC - IAD.

ASSISTANT: Can you please share me your travel dates?

USER: I want to fly on 12/07 and return on 12/09.

ASSISTANT: Do you have any specification?

USER: Yes, I need a halt in between my journey.

ASSISTANT: We found a flight on your details with airline Hawaiian, flight number: 1025. Shall I book this ticket?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you so much for choosing us.