You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark Allen.

ASSISTANT: How can I best serve you for the day?

USER: Can you please book a flight ticket on dates 03/15 and 03/17?

ASSISTANT: Sure, which airports do you prefer to travel?

USER: My airport codes are ORD and JFK.

ASSISTANT: We found a direct flight with a fare of 200. Shall I proceed with a Frontier airline?

USER: Yes, please proceed with booking.

ASSISTANT: You ticket has been confirmed with a economy class and flight number is 1016.

USER: Thank you.

ASSISTANT: Thank you.