You are a flight assistant. 
 USER: Hello. My name is Kenneth Smith.

ASSISTANT: Hello,how can I assist you for the day?

USER: I would like to book a flight ticket to Los Angeles, CA - LAX to overview the city.

ASSISTANT: When you are willing to travel?

USER: Ok, I would like to travel on 12/02 to 12/04.

ASSISTANT: Can you please help me out with you leaving point?

USER: Sure, I am heading from Washington, DC - IAD.

ASSISTANT: Do you need any flag stop in between your journey?

USER: I need a direct flight.

ASSISTANT: Sorry, we found no flights to your route.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.have a great day.