You are a flight assistant. 
 USER: Hi, I am Margaret Gonzalez.

ASSISTANT: Hello, how may I help you today?

USER: Please assist me to book a connecting flight from CO to take a part in scuba driving at Evans river in TX.

ASSISTANT: Sure, can I know your travel dates?

USER: I want to start on Dec 13th and my return date will be on Dec 15th.

ASSISTANT: Ok, Can you please help me with your country codes?

USER: My source point is DEN and my destination point is AUS.

ASSISTANT: May I know your connection limit?

USER: I already mentioned above.

ASSISTANT: Do you have any specific travel timings?

USER: I need to return in the afternoon.

ASSISTANT: May I know any other requirement?

USER: No.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issues, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for contacting us.