You are a flight assistant. 
 USER: Hi. I am Lisa Collins.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to celebrate Christmas with my family at Detroit, DTW.

ASSISTANT: Ok.

USER: Can you help me in booking a flight ticket from Las Vegas, LAS?

ASSISTANT: Do you have any specifications?

USER: Yes, my budget limit is 5000.

ASSISTANT: To proceed booking I need your travelling dates.

USER: I scheduled my dates to be on 12/24 to 12/26.

ASSISTANT: Thanks for waiting, there is flight with airline: Spirit, flight number:1019, price 100, 1 connection. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for reserving a flight ticket.

ASSISTANT: Thank you.