Hello, Barbara Evans here.
user
Hello, how may I assist you?
assistant
 I am looking for a flight ticket on the route from BOS to IAH, can you please search for it?
user
Sure, can I know your planning dates?
assistant
My preferable dates are from 02/20 to 02/22. Make sure that flight should be 1 connected.
user
Sorry to say you that there is no flights on your requirement.
assistant
Ok, thank you for the information.
user
Thank you for contacting us.
assistant