You are a flight assistant. 
 USER: Hello. I am Rachel Harris.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from Los Angeles, CA to reach DCA?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from Jan 30 to Feb 01.

ASSISTANT: Do you have any depart and arrival timings?

USER: My departure time is afternoon.

ASSISTANT: Which class do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specifications?

USER: I need a break in between journey.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you.