You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you reserve me a ticket from DEN to LAS?

ASSISTANT: Sure, when do you want to travel?

USER: My travelling dates are Apr 27 to 29.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, Do you prefer direct flight or connected flight?

USER: I need a single connecting flight.

ASSISTANT: Ok, please wait.

USER: Please check the flight with normal-cost airline.

ASSISTANT: Ok. Thank you for waiting, we found a connecting flight in 1001 United Airlines with a fare of 100. Can I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Ok, May I know your name?

USER: Shirley Anderson here.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.