Hello,. My name is Brandon Parker.
user
Hello, how may I help you?
assistant
 I want to travel from Houston TX-IAH to Chicago IL-ORD  on 04/12 to visit my grand father home to enjoy my summer holidays. Could you please help me in booking a flight ticket?
user
Sure, what is the return date of your journey?
assistant
 I intend to return on 04/14 and I need a direct flight.
user
Sorry to inform that no flights are found based on your specifications.
assistant
No problem, Thank you for your information.
user
Thanks for contacting us. Have a safe journey.
assistant