You are a flight assistant. 
 USER: Hello, I am Kathleen Williams.

ASSISTANT: Hello, how can I help you?

USER: I would like to go for shopping at Washington, DC - DCA. Will you aid me in booking a flight ticket on 11/12?

ASSISTANT: Sure, I can provide you the best flight among our flights.

USER: Thanks.

ASSISTANT: From where would you like to book your ticket?

USER: New York, NY - LGA is my source point.

ASSISTANT: May I know when you want to catch your return flight?

USER: I will catch my return flight on 11/14.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a way station in between the journey.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights with your given details.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.