Hello. I am John Miller.
user
Hello. How can I help you?
assistant
I would like to visit central park at New York, NY - JFK. Can you please book a ticket from Washington, DC - DCA?
user
OK, may I know your journey dates?
assistant
I have to depart on 05/27 and return on 05/29.
user
Ok, please wait.
assistant
Sure.
user
 Sorry, no flights are found on your requested dates.
assistant
Ok, no issue. Thanks for your service.
user
Thank you for availing us.
assistant