Hello.
user
Hello. How can I assist you?
assistant
I am Christopher Harris, I need to book a ticket from IAD to LAX, can you help me?
user
Ok, may I know your travelling dates?
assistant
My travelling dates are 12/21 to 12/23.
user
Sorry, no flights found your route to reserve.
assistant
Ok, no problem. Thank you for the information.
user
Most welcome.
assistant