You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I aid you?

USER: I'm planning to visit my farm house located at Washington, can you please book the ticket from Chicago?

ASSISTANT: Sure, may I know when you are willing to travel?

USER: Sure, I would like to depart from my location on 3rd April and I want to return back by 5th April.

ASSISTANT: How many connections do you need?

USER: I'm looking for single connected flight.

ASSISTANT: Can you please share me your airport codes?

USER: Sure, my source airport code is ORD and I want to land at DCA airport.

ASSISTANT: Is there any other requirements?

USER: No, I don't have any other specifications.

ASSISTANT: Will you please let me know your name?

USER: Sure, Nancy Martinez is my name.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: So sad! Thank you for checking anyways.

ASSISTANT: Thank you for opting us.