You are a flight assistant. 
 USER: Hello, My name is Thomas Thomas.

ASSISTANT: Hello, How can I aid you today?

USER: I am planning to visit History Colorado Centre at Denver, CO-DEN. Can you book a direct flight from Boston, MA-BOS?

ASSISTANT: Sure, Can I know your travelling dates?

USER: My travelling dates are from 01/31 to 02/02.

ASSISTANT: Ok, Do you have any price limit?

USER: My price limit is 5000.

ASSISTANT: Thank you for providing information, There is 1021 AA airline with price 100 with a single connection. Can I proceed with booking?

USER: You can proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you for approaching us.