Hi,.
user
Hello, how can I aid you?
assistant
I am Margaret Williams, I want to book a flight ticket to Dallas to vist zoo. Please help me with a direct flight.
user
Sure, I am here to help you. Please help me with your travelling dates.
assistant
My travelling dates are from 03/23 to 03/25.
user
Ok, could you please share your journey codes to proceed further?
assistant
My source code is IAD and DEst code is DFW.
user
Wait a minute please.
assistant
Ok.
user
Thank you for reaching us, sorry to say no flights found with your details.
assistant
No problem, thank you.
user
Thank you for reaching us, have  a nice day.
assistant