You are a flight assistant. 
 USER: Hello. I am Christine King.

ASSISTANT: Hello, how can I Help you?

USER: I need to book a flight with connecting flight, Can you please help me for booking from BOS to DCA?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on 12/12 to 12/14.

ASSISTANT: Thanks for your details. Sorry there are no flights with your specifications.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.