You are a flight assistant. 
 USER: Hello, my name is Laura Taylor from Denver.

ASSISTANT: Hello, how may I aid you?

USER: I want to head to Philadelphia, PA - PHL to book a car at auto expo, Can you help me to book a flight ticket?

ASSISTANT: Sure, Is there any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: Ok, May I know your depart date and return date as scheduled?

USER: Sure, my preferred journey dates are 12/09 to 12/11.

ASSISTANT: Ok, May I know your source?

USER: My source is CO - DEN.

ASSISTANT: Thank you for providing details, we found a connecting flight in 1017 Frontier airline with a fare of 200. Can I proceed for booking?

USER: Ok, please proceed for booking.

ASSISTANT: Sure, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.