You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please book a ticket from DCA to LAX to go for shopping.

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

USER: My travelling dates are May 29 and May 31.

ASSISTANT: May I know your name for further process?

USER: I am Timothy Mitchell.

ASSISTANT: May I know your connection limit?

USER: I want single connected flight.

ASSISTANT: Sorry to inform you that, there is no flight found as per your travelling dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.