Hello.
user
Hello.
assistant
I am Charles Lee.
user
How can I help you?
assistant
Can you book a flight ticket from IAD to IAH?
user
Sure, I am ready to help you. May I know your travelling dates?
assistant
Mar, 28 and Mar, 30 are my preferable travel dates.
user
Do you have any class preferences?
assistant
No.
user
May I know your connection limit?
assistant
I need a connecting flight.
user
Can you please share your airline preferences?
assistant
I am comfortable with any airlines.
user
Do you have any other requirements?
assistant
My depart time should be at afternoon.
user
Sorry, there are no flights found on your trip dates.
assistant
It's ok, thank you for checking.
user
Thank you for consulting us.
assistant