You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Brenda Collins. I want to travel from DCA to CLT. Could you help me in booking the ticket?

ASSISTANT: Sure, may I know the travelling dates?

USER: It's from 06/18 to 06/20. Make sure the connection is 0.

ASSISTANT: Sorry, there is no flight with 0 connection.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.