You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Thompson.

ASSISTANT: How can I help you Rebecca?

USER: Can you help me in booking the ticket from DCA to SFO?

ASSISTANT: Sure, Please let me know your travel dates.

USER: My planning dates are from 02/26 to 02/28.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: I found a direct flight for you, shall I book?

USER: I need a flight with 1 connection.

ASSISTANT: Sorry, no flight is available with 1 connection on your route.

USER: That's fine.

ASSISTANT: Thank you for choosing us.

USER: Thank you.