Hi.
Hello.
I am David Parker.
How can I help you at this moment?
 I want to give a surprise to my brother by attending his convocation day on 04/19, can you please help me in booking a flight ticket?
Sure, I will help you with that. Can you please mention your preferable airport code names?
My source is ORD and destination is IAH.
Is there any trip that your planning to ORD?
My return date is 04/21.
Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.
Sure.
Sorry for the inconvenience no flights available in this route as per your requested dates.
No issue, thank you.
Thank you for visiting us, have a good day David Parker.