You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How best can I help you now?

USER: I need to buy a plane ticket from LAX to DCA. Please help me in that.

ASSISTANT: Sure, I am perky to help you. May I know your journey dates, please?

USER: My trip dates are from Oct, 19 to Oct, 21.

ASSISTANT: Do you have any limit on maximum number of connections?

USER: I need a single connecting flight.

ASSISTANT: May I know your class preference for your journey?

USER: I am comfortable with any class.

ASSISTANT: Can I know your airline preference, please?

USER: I am happy with any airlines.

ASSISTANT: Let me know your departure and arrival timings for your trip.

USER: I do not have any specifications on timings, Please book my ticket quickly.

ASSISTANT: Will you provide me your good name for documentation purpose?

USER: Carol Hall.

ASSISTANT: Sorry to say that, we have not found any flights running on your routes.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.