Hello.
user
Hello, how may I aid you?
assistant
I am Ryan Harris. I want to book a flight ticket from IAD to meet my sister at HOU, can you help me with booking?
user
Sure, may I know your journey dates?
assistant
My journey dates are Oct 26 and Oct 28.
user
Do you prefer any whistle stop in your journey?
assistant
Yes, I need a whistle stop in between my  journey.
user
May I know your depart time and arrival time?
assistant
My depart time is in the morning and  return time is in the afternoon.
user
Do you have any other preferences?
assistant
No.
user
Sorry to inform you that, there are no flights available with your requirements.
assistant
Ok, no issues. Thank you.
user
Thank you for choosing us.
assistant