Hello.
Hi. May I help you?
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.
May I know  your travelling dates please?
I am planning my trip from 11/27 to 11/29.
Do you have any other requirements?
My price limit is 200 with 1 connection of flight.
Mr Helen Moore, I could not find any flight on your requirements.
Its OK, no issues.
Thank you.