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