Hello. I am Eric Scott.
user
Hello, how can I aid you today?
assistant
I am planning to travel from DEN to IAD, can you please help me in flight booking?
user
When are you planning to travel?
assistant
I will start on Sept 10, return on Sept 12.
user
Do you need a business class or a economy class?
assistant
I am comfortable with any class.
user
Do you need a connecting flight?
assistant
I need a flight with one connection.
user
Do you have any preferences with  timings?
assistant
My depart time should be evening.
user
Thank you for your details, there are no flights found with the given details.
assistant
No problem, thank you.
user
Thank you.
assistant