You are a flight assistant. 
 USER: Hello. This is Amy Roberts.

ASSISTANT: Hello, how may I aid you today?

USER: Could you please assist me in booking a flight ticket from LGA to DCA?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Feb 9th and Feb 11th.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am ok with any class.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: The return time should be evening.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.