You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I'm Gregory Lewis. I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure, please let me know your journey dates.

USER: Sure, I would like to take off on 02/10 and return on 02/12.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I found a flight in Spirit airlines with price 100. Would you like me to book the ticket?

USER: That's perfect, please proceed with the booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1026.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.