You are a flight assistant. 
 USER: Hi, I am Charles Lewis.

ASSISTANT: Hello, how may I support you?

USER: I want to book a flight ticket to Denver with price under 500, can you please help me with it?

ASSISTANT: Sure, I will help you with that. May I know your source and destination airport codes?

USER: Airport codes are DFW-DEN.

ASSISTANT: Please share me your planned journey dates?

USER: Travel dates are 11/20 and 11/22.

ASSISTANT: Do you need any halt in between the journey?

USER: I need a halt in between the journey.

ASSISTANT: Thanks for the details, I found a connecting flight 1018 of airline Spirit. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been booked on fare of 100.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.