Hi, I am Amy Brown.
Hello, how can I help you?
 We are planning to go Washington, DC - DCA, to participate in the event of fashion designer with my colleagues from Houston. Can you help me to book a flight ticket from TX - IAH?
Sure, can you please share your travelling dates?
I would like to travel on 12/05 and 12/07.
Do you have any specifications?
I need a connecting flight. Make sure the price limit does not exceed 500.
Please wait for a while, I will check and get back to you.
Sure.
Sorry to say that we did not found any flights with your given details.
Ok, no problem. Thanks for your quick response.
Thanks for choosing us.