You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in ticket booking from DCA to IAD?

ASSISTANT: Sure, I am here to help you. Can I have your planned journey dates?

USER: My travelling dates are from 12/10 to 12/12.

ASSISTANT: Let me know your connection limit.

USER: I am looking for a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I am looking for evening flight. Can you please check once?

ASSISTANT: Sure, Your good name please?

USER: Myself Kathleen Carter.

ASSISTANT: Thank you for sharing the details. There were no flights available that matches your specifications.

USER: It's ok, thank you.

ASSISTANT: Thank you for contacting us.