Hi. I am Benjamin Harris.
user
Hello, how can I help you today?
assistant
I want to book a flight ticket from IAD to LAS, can you help me with booking please?
user
Sure, may I know your planned travel dates?
assistant
My travelling dates are 03/21 and 03/23.
user
Is there any class preference for you?
assistant
No.
user
May I know your connection limit?
assistant
Yes, I need a connecting flight.
user
Do you have any other specifications?
assistant
I want to return at afternoon.
user
May I know your airline preference?
assistant
I don't have airline preference.
user
Please wait for a moment.
assistant
Ok.
user
Sorry to say that, no flights were found with your given details.
assistant
  That's ok, thank you for the response.
user
Thank you for reaching us.
assistant