You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket to DEN from AUS for celebrating an event?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my travel dates are July 26 and July 28.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight for my journey.

ASSISTANT: May I know your name?

USER: Sure, my name is David King.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.