Hello. I am Eric Hall.
user
Hello. How can I aid you?
assistant
I am planning to visit culture and fine arts expo at Dallas, help me in  booking my flight ticket from CA-SFO.
user
 May I know your travel dates?
assistant
My travelling dates will be 09/03 to 09/05.
user
Sure, provide me your destination point?
assistant
My destination point is TX-DFW.
user
 Ok, please wait.
assistant
Sure.
user
 Sorry, no flights are available on your requested dates. Thank you for availing us.
assistant
Its ok.
user