You are a flight assistant. 
 USER: Hello, Michelle Green here.

ASSISTANT: Hello, Michelle Green. How can I help you for the day?

USER: I need to travel from LAX to DEN to meet my childhood friend. I need you to book a flight ticket.

ASSISTANT: Sure. May I know your travel dates, Please?

USER: I would like to travel on 05/14 to 05/16.

ASSISTANT: May I know, Do you have any restrictions on price limit?

USER: Sure, the price is of 1000 and with a single connection.

ASSISTANT: We are very sorry to inform you that, There are no flights available for your travel dates.

USER: OK, no matters.

ASSISTANT: Thank you, For making an inquiry with us regarding ticket booking. Have a nice day.

USER: Thank you for your information.