Hi.
user
Hello. How can I assist you today?
assistant
I am Robert Thomas. I want to book a  flight ticket from ORD to HOU. Can you help me?
user
Sure, will you mention your travelling dates please?
assistant
Thank you. Apr 23rd and 25th are my travelling dates.
user
Do you have any specifications?
assistant
I need to return in the evening.
user
Do you have any other preferences?
assistant
It should be a connecting flight.
user
Please give me a moment.
assistant
Ok.
user
Thanks for waiting, there is no flights found under your preferable details.
assistant
No issue. Thank you.
user
Welcome, have a great day.
assistant