Hi. I am Nancy White.
user
Hello, how may I best serve you now?
assistant
I want to book a flight ticket on 01/15 and return on 01/17, so can you help me with booking please?
user
Sure, please share me your airport abbreviates?
assistant
    Sure, my airport codes are Denver, CO-DEN and Washington, DC-IAD.
user
Do you need any lay over in between journey?
assistant
Yes, I need a connecting flight.
user
Ok, please wait for a while.
assistant
Ok.
user
Sorry to inform that, there is a no connecting flight available on your journey dates.
assistant
That's ok, thank you for the information.
user
Thanks for consulting us, have a nice day.
assistant