You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Myself Joseph Scott, will you help me in booking the flight ticket from DEN to AUS?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My preferable journey dates are July 11 and July 13.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight in economy class which return in evening time.

ASSISTANT: Give me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for contacting us.