Hello. I am Joshua Parker.
Hello, how may I help you today?
 I want to visit Houston Zoo, TX-IAH with my sister. Can you book a direct flight?
Sure, can you please help me with your journey dates?
My travel dates are 12/08 and 12/10.
May I know your origin airport code please?
 I will depart from PA-PHL.
Please wait for a while.
Ok.
Sorry, there is no flight found on your given details.
Thanks for your help.
Thanks for choosing us.