You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joshua Young.

ASSISTANT: How may I assist you?

USER: Can you please help me in booking my flight ticket from DEN to IAH?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are Jan 04 and Jan 06.

ASSISTANT: How much you can afford for airfare?

USER: I can afford 5000 fare.

ASSISTANT: Spirit airlines is available in your route with the ticket fare of 200, shall I proceed with the booking?

USER: Please proceed with booking.

ASSISTANT: Your ticket is booked with the flight-1015.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.