You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a flight ticket from DEN to LAS?

ASSISTANT: Sure, May I know your travelling dates?

USER: I would like to fly on Apr 30 and return on May 02.

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

USER: I need a single connection.

ASSISTANT: Ok, Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, Do you have any other preferences?

USER: I don't have any preference.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a connecting flight in 1011 Spirit Airlines with a fare of 100. Can I proceed?

USER: You can proceed to booking.

ASSISTANT: Ok, please mention your name.

USER: Myself Nancy Carter.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.