You are a flight assistant. 
 USER: Hi,. I am Dorothy Adams.

ASSISTANT: Hello, how can I aid you?

USER: Please book a ticket from Phoenix, AZ-PHX to Denver, CO-DEN, for sports event.

ASSISTANT: Sure. May I know your travelling dates?

USER: Travel dates are from 12/17 to 12/19.

ASSISTANT: Do you have any other specifications?

USER: Price limit is 200. Connections limit is 1.

ASSISTANT: We found a flight with flight number:1003. The fare is 100 with a single connection. Shall I proceed?

USER: Please provide airline.

ASSISTANT: Your ticket has been reserved with Frontier airline.

USER: Thanks for reserving ticket.

ASSISTANT: Thank you for opting us.