Hi.
Hello, how can I assist you at this moment?
Please help me to book a flight ticket from DFW to IAH.
Sure, I will help you with that.
Thank you.
Can I have your travelling dates please?
My travelling dates are from Apr, 26 to Apr, 28.
Ok, please let me know the preference of class.
I am comfortable with any class.
Are you looking for any stop overs in between your journey locations?
Yes, I need a single connecting flight.
Do you prefer any specific airlines?
I am ok with any airlines.
Can I have your good name please?
I am Elizabeth Harris.
Sorry to inform you  that no flight is available to you on your dates.
No problem, thanks for your information.
Thank you for choosing us, have a good day.