You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Nelson.

ASSISTANT: How may I assist you now?

USER: I am planning to attend music concert at SEA, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Kevin Nelson, may I know your travelling dates please?

USER: Sure, I would like to take off on Oct 27 and return on Oct 29.

ASSISTANT: Do  you have any requirement?

USER: I prefer normal cost airline.

ASSISTANT: Flight-1001 is available for you with 0 connection at the price of 200. Can I book it for you?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is reserved, thank you for choosing us.

USER: Thank you for your help.