You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you today?

USER: I need a ticket from Denver, CO-DEN to Charlotte, NC-CLT.

ASSISTANT: Ok, can you please share your journey dates that you prefer to travel?

USER: My journey dates are from 06/24 to 06/26.

ASSISTANT: Do you have any other restrictions to be met?

USER: Price limit is 1000. Please provide direct flight.

ASSISTANT: May I know your name please?

USER: My name is Robert Walker.

ASSISTANT: Please wait for a moment. I will check the availability of the flights.

USER: Ok.

ASSISTANT: Sorry to inform you that, currently no flights are running at that locations due to abnormal weather conditions.

USER: Thanks.

ASSISTANT: Thank you for reaching us.