Hello.
user
Hello, how can I serve you?
assistant
 I am Patrick Gonzalez. I want to travel to DC-DCA from TX-IAH to attend a meeting. Can you book a direct flight?
user
Sure, can you please help me with your travelling dates?
assistant
 My travel dates are 05/15 and 05/17.
user
Please wait a moment, I will check and revert to you.
assistant
Ok.
user
We are sorry to inform you that there is no flights found with your matching information.
assistant
Ok, no issues. Thank you for your help.
user
Thank you for choosing us.
assistant