You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a normal cost flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your location airport codes.

USER: My airport codes are BOS and DEN.

ASSISTANT: Can you share me your planned trip dates?

USER: My travel dates are Aug 20 and Aug 22.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: Here is a connecting flight in economy class with Delta airlines. Can I proceed with it?

USER: Please ensure that I would like to depart in the evening time.

ASSISTANT: May I know your name?

USER: I am Anna Robinson.

ASSISTANT: The above intend flight departs in the evening only i.e 20:00 hours. Can I proceed with it?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with 1002 flight.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.