You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking from DCA to LAX?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are from Sept 28 to Sept 30.

ASSISTANT: Do you have any connection limit?

USER: No.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Can I have your name please?

USER: My name is Nicole Lee.

ASSISTANT: United airlines flight 1004 available with connection and fare is 100, shall I confirm this economy class flight?

USER: Ok, please book it.

ASSISTANT: Ok, your ticket has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.