Hello.
user
Hello, how can I help you today?
assistant
I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket from IAD to ORD?
user
Sure, I am here to help you in booking. Can you please share your travel dates?
assistant
I would like to depart on May 25th and return on May 27th.
user
Ok, may I know your name?
assistant
I am Barbara Garcia.
user
Do you need any break in between your journey?
assistant
I am looking for a connecting flight.
user
Do you have any specification?
assistant
Make sure that my depart time must be evening and return time must be afternoon.
user
Sorry, no flights are available on your preferable travel dates.
assistant
Ok, not an issue. Anyways, thank you for the information.
user
Thank you for reaching us, have  a nice day.
assistant