You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I would like to visit Millennium Park with my sister, I want to book a ticket. Please help me out.

ASSISTANT: Sure, I will be happy to help you. Can you please provide me your trip dates?

USER: My trip dates are from 12/24 to 12/26.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from BOS to ORD.

ASSISTANT: Can I have your name please?

USER: My name is William Gonzalez.

ASSISTANT: Flight-1019 is available with 1 connection and the ticket cost is 100 only. Shall I book the ticket for you?

USER: Ok, please proceed with my booking.

ASSISTANT: Your ticket is booked successfully with Frontier airlines.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us and happy journey.