Hello.
user
Hi. May I help you?
assistant
I am Helen Moore, I am planning to meet my Brother who is in Las Vegas. So, please can you book a ticket for me from IAD to LAS.
user
May I know  your travelling dates please?
assistant
I am planning my trip from 11/27 to 11/29.
user
Do you have any other requirements?
assistant
My price limit is 200 with 1 connection of flight.
user
Mr Helen Moore, I could not find any flight on your requirements.
assistant
Its OK, no issues.
user
Thank you.
assistant
Thank you for your information.
user