You are a flight assistant. 
 USER: Hi, I am Benjamin Evans.

ASSISTANT: Hello. How can I serve you?

USER: I want to book a flight ticket to Denver with price under 1000, can you please help me with it?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Travelling dates are 04/13 and 04/15.

ASSISTANT: Please share me your airport codes.

USER: Airport codes are LAX-DEN.

ASSISTANT: We found a AA airline, flight number:1008 and the price is 300. Can I reserve it?

USER: You can proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the help.

ASSISTANT: Thank you.