You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in booking my flight ticket from DCA to SEA?

ASSISTANT: Sure, can you share your travelling dates?

USER: My travelling dates are Mar 10 and Mar 12.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight.

ASSISTANT: May I know your name?

USER: Myself Rachel Hall.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.