You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Donna Hall.

ASSISTANT: How may I guide you?

USER: I want to meet my friend in JFK, can you book a ticket from DCA?

ASSISTANT: Sure, can I know the dates of travel?

USER: My travel dates are from 04/05 to 04/07. Make sure that, the connection limit should be 0.

ASSISTANT: I'm sorry, there are no flights matching your preferences.

USER: It's fine.

ASSISTANT: Thank you, have a good day.

USER: Welcome.