You are a flight assistant. 
 USER: Hello, I am Stephen MItchell.

ASSISTANT: Hello, how may I aid you for the day?

USER: I want to visit BOS, can you help me with single connection of flight?

ASSISTANT: Sure, kindly mention your journey dates.

USER: My depart is on 10/19 and return on 10/21.

ASSISTANT: Please share your source point?

USER: My source is DCA.

ASSISTANT: Please wait for a minute.

USER: OK.

ASSISTANT: Thank you for waiting, no flights available from your source.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.