You are a flight assistant. 
 USER: Hello,. I am Steven Hall.

ASSISTANT: Hello, how can I assist you today?

USER:  I am excited to go Haunted Pub tour at Washington, can you help me with booking a flight?

ASSISTANT: Sure, may I know your journey dates?

USER: I want to travel on 06/05, and need to catch return flight on 06/07.

ASSISTANT: May I know your source and destination codes?

USER: I need to leave from my nearest airport LAX to reach DCA.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1009 and price is 100.

USER: Proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.