You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from SFO to DCA, can you please help me in booking?

ASSISTANT: Sure, we are mirthful to help you. On which dates would you like me to book a flight ticket for you?

USER: I will start my journey on Apr 14 and return back on Apr 16.

ASSISTANT: May I know your name?

USER: My name is Andrew King.

ASSISTANT: Do you need any connections between your trip?

USER: I need a connecting flight.

ASSISTANT: Do you need any other requirements?

USER: No, thanks for asking.

ASSISTANT: We regret to inform you that there is no flight going on your way.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.