Hello.
user
Hello. How may I help you out?
assistant
I am Mark Jones. Can you help me in booking my flight ticket from DEN to ORD?
user
Sure, I will help you in booking the ticket. May I know your travelling dates please?
assistant
My trip dates will be Jan 14th to Jan 16th.
user
Do you have any specifications?
assistant
I need a lay by flight.
user
Can I know any other preferences?
assistant
I need a depart flight which should  be in the afternoon.
user
Please wait a moment.
assistant
Sure.
user
Sorry, there are no flights found.
assistant
Its ok, thank you.
user
Thank you for reaching us.
assistant