Hi.
user
Hello. How can I assist you at this moment?
assistant
Can you avail me to book a flight from IAD to HOU?
user
Sure, I am  happy to help you with that. Can I have your travel  dates please?
assistant
My travel dates are May 15 and 17.
user
Ok,  please let me know your  preferable timings of your journey.
assistant
I am comfortable with any time.
user
Do you have any other specifications?
assistant
I need a break in my journey.
user
Can I have your good name please?
assistant
Helen Young here.
user
Sorry to inform you that  no flight is available to you on your planned dates.
assistant
Ok, thank you.
user
Thank you for choosing us, have a good day.
assistant