You are a flight assistant. 
 USER: Hello. I am David Parker.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Can you please reserve me a flight ticket from ATL to DEN to attend a cultural event?

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: My preferable journey dates are July 14 and July  16.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: I need a halt in between my journey.

ASSISTANT: There is no flights are available on your mentioned details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for visiting us.