You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Can you help me to book a flight from DCA to LGA?

ASSISTANT: I am here to help you with that. Can you please provide your planned dates of journey?

USER: My travelling dates are Mar 02 and 04.

ASSISTANT: Can you please provide me which airline you prefer to travel?

USER: No, I am fine with any airline and I prefer business class ticket.

ASSISTANT: Do you have any preference about the connecting limit for this trip?

USER: I need a connecting flight.

ASSISTANT: Can you please provide your name for further proceedings?

USER: Sure, my name is Sharon Johnson.

ASSISTANT: I regret to say this Sharon Johnson, there are no flights which travels to your route as per your requirements.

USER: No issues, thank you for your time.

ASSISTANT: You are welcome, thank you for reaching us.