You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Justin Miller.

ASSISTANT: How may I help you today?

USER: I am looking to book a flight ticket to meet my friend in Denver. Can you help me for booking a flight ticket from IAH to DEN?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: My travelling dates are Jan 26 and Jan 28.

ASSISTANT: Do you have any other specifications?

USER: My return time is afternoon.

ASSISTANT: Ok, may I know your class preference?

USER: Any class is fine for me.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight which is returning in the afternoon  time with the connection limit 1 in the southwest  airlines and the ticket cost is 300. Shall I proceed to reserve an economy class flight ticket?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, I have reserved your ticket with the flight-1005 and the return time is 16:00 PM Have a nice journey.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us. Have a safe journey.

USER: Welcome.