You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to travel from BOS and DCA, can you please reserve flight ticket?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are Feb,23 and Feb,25.

ASSISTANT: Do you have any connecting limit preferences?

USER: No preference in connection limit.

ASSISTANT: Is there any other concern?

USER: My return time should be in the morning.

ASSISTANT: May I know your name please?

USER: Myself Amy Edwards.

ASSISTANT: No flights found as per your preferences.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for the information.

ASSISTANT: Thank you for choosing us.