Hi.
user
Hello, how can I aid you?
assistant
I have got an invitation to participate in photography contest in Washington DC - DCA. So can you please book a ticket from Los Angeles, CA - LAX?
user
Sure, please provide me your days of travelling?
assistant
My dates of travel are from 07/31 to 08/02.
user
Ok, please wait I will revert you.
assistant
OK.
user
We are glad to inform you that there is a flight matching your requirement.
assistant
Flight details please?
user
Airline: AA, flight number:1002. Price is 200 with a single connection.
assistant
OK, please confirm booking.
user
To proceed further can I know your name please?
assistant
I am Helen Smith.
user
Your booking is confirmed.
assistant
Thank you for your kind reply and positive response.
user
Thank you  for choosing us.
assistant