You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to attend music concert at BOS, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure, please share your trip dates.

USER: I would like to take off on Nov 29 and return on Dec 1.

ASSISTANT: Do you need any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: If you have have any other requirements, let me know?

USER: I don't have any other requirement.

ASSISTANT: Please wait.

USER: Sure, take your time.

ASSISTANT: May I know your name?

USER: My name is Nicholas Taylor.

ASSISTANT: There are no flights available on your routes.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are welcome.