You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ruth Lopez. I want to book a flight ticket from LAS to DCA. Could you help me in booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are from 02/10 to 02/12.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need a halt.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.