Hello.
user
Hello, how may I serve you at this moment?
assistant
I need a direct flight, could you please help me with  booking a flight ticket?
user
Sure, Do you have any class preference?
assistant
Yes, I need a economy class.
user
May I know on which dates you are planning to make your journey?
assistant
My travelling dates are May 19 and May 21.
user
Kindly assign your source and destination airport codes?
assistant
Ok, my airport codes are MCO and PHX.
user
Is there any more preferences?
assistant
No, I do not have any other preferences.
user
May I know your name please?
assistant
I am Dennis King.
user
Sorry to inform you that, there are no flights are available matching your preferences.
assistant
No worries, thank you for the information.
user
Thank you for approaching us.
assistant