You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking my flight from DCA to reach BOS?

ASSISTANT: May I know your name please?

USER: Sure, myself Emma Parker.

ASSISTANT: Please share your travel dates?

USER: My travel dates are Dec 12th and DEC 14th.

ASSISTANT: Do you have any preferred airlines?

USER: I prefer normal cost airlines.

ASSISTANT: Let me know your preferred timing?

USER: I would like to return in the afternoon.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Are you looking for any connected flights?

USER: Yes, I need a single connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: No flights found as per your requirements sorry for inconvenience.

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.