You are a flight assistant. 
 USER: Hello, I am Betty Taylor.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket from AUS to DEN to meet my parents. Can you please book a connected flight ticket?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My journey dates are Dec 15 and Dec 17.

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

USER: I prefer a departure time at morning. Please make sure it should be economy class airline.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.