You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to buy a plane ticket from AUS to DEN. Please help me in that.

ASSISTANT: Sure, could you please provide your preferred dates of journey?

USER: My journey dates are from Feb, 07 to Feb, 09.

ASSISTANT: Do you have any specifications?

USER: I prefer to return in the afternoon.

ASSISTANT: Please let me know your connection limit?

USER: I am happy with any flight.

ASSISTANT: May I know your good name?

USER: Jonathan King.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.