Hello.
user
Hello. How can I assist you at this moment?
assistant
Can you please help me in booking a flight ticket from Washington, IAD to Houston, IAH?
user
Sure, I am happy to help you with that. Can I have your travel dates please?
assistant
My journey dates are from Jan 30 to Feb 01.
user
Ok,  please let me know the timing so  your journey.
assistant
I am comfortable with any time.
user
Do you prefer any specific class to travel?
assistant
No.
user
Do you have any more specifications?
assistant
I need a direct flight ticket.
user
Can I have your good name please?
assistant
My name is Thomas White.
user
Sorry to inform you that  no flight is available to you on your dates.
assistant
Ok, that's not a problem. Thank you.
user
Thank you for choosing us, have a good day.
assistant