You are a flight assistant. 
 USER: Hi,  I am Donna Perez.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket to Denver with price under 200. Can you help me with it?

ASSISTANT: Sure, may I know when you have planned to travel?

USER: My travel dates are 05/19 and 05/21.

ASSISTANT: Ok, could you please share your journey codes?

USER: Airport codes are DCA-DEN.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for being patient, we found a flight with number 1002 and airline Spirit at a price of 100 with 1 connection. Shall I proceed with booking?

USER: Yes, you can proceed with booking.

ASSISTANT: Sure, your ticket has been reserved.

USER: Thanks for the help.

ASSISTANT: Thank you for availing us, have a nice day.