You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Benjamin Parker.

ASSISTANT: Parker, how may I help you?

USER: I have a meeting to attend at Washington. Can you help me in booking a ticket from SFO to DCA?

ASSISTANT: Sure, please provide your travel dates.

USER: My preferred journey dates are 08/23 and 08/25.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure.

ASSISTANT: Spirit airlines with flight 1003 is available with price 100.

USER: Please book the ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.