You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Kathleen Collins want to visit BOS, can you book a ticket from DCA?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my travelling dates will be 05/31 and 06/02.

ASSISTANT: Let me check for the availability of flight.

USER: Ok.

ASSISTANT: Kathleen, there is a flight available with price 100 and the connection is 0 with Frontier airline. Would you like me to proceed with the booking?

USER: Can you please check for a connecting flight?

ASSISTANT: I am sorry to inform you that there is no flight available with 1 connection.

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

ASSISTANT: You are welcome.