You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you help me to book flight ticket from PHL to DFW?

ASSISTANT: Sure, I am here to help you with that. Can you please share your preferable travel dates?

USER: My travelling dates are on Dec 28 and return on Dec 30.

ASSISTANT: May I know your name please?

USER: I am John Adams.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class.

ASSISTANT: Can I know your connection limit?

USER: I prefer a connecting flight for this journey.

ASSISTANT: Do you have any other specifications?

USER: I do not have any other specifications.

ASSISTANT: There is a connecting flight-1001 available in Frontier Airlines with a fare of 100. Shall I proceed with booking?

USER: Yes, you can proceed with this.

ASSISTANT: John Adams, your booking is done in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us, have a safe journey.