You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know your good name please?

USER: I am Timothy Mitchell.

ASSISTANT: How can I assist you today?

USER: I have planned to visit national museum of American History. Help me with booking the ticket.

ASSISTANT: Sure, may I know your journey points?

USER: My ticket price should be less than 1000 with Austin, TX- AUS as origin point and Denver as CO- DEN. CO- DEN as dest airport.

ASSISTANT: May I know your journey dates?

USER: I want my travelling dates from 05/29 to 05/31.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform that we have no flights available with your required details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thanks for choosing us.