You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I best serve you today?

USER: Could you please book a flight ticket from IAH to DEN?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: My trip dates are Apr 23 and Apr 25.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I need a connecting flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I don't have any other specifications.

ASSISTANT: Can I know your good name to proceed further?

USER: I am Melissa King.

ASSISTANT:  There is a flight in Southwest airlines with the ticket price of 100 having one connection and economy class. Can I proceed to booking?

USER: Ok, proceed.

ASSISTANT: Your booking is confirmed and the flight number is 1004.

USER: Thank you.

ASSISTANT: Thank you for choosing us.