You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight from HOU to DEN?

ASSISTANT: When are you willing to travel?

USER: I want to travel on Apr 7 and need to return on Apr 9.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I prefer a connecting flight.

ASSISTANT: Do you have any time concern?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: Nicholas Phillips here.

ASSISTANT: Frontier Airlines is providing a connecting flight with airfare of 100. Shall I proceed with flight 1003?

USER: Please proceed.

ASSISTANT: For a economy class your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.