You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am planning to attend a Tennis competition in Austin AUS from PHL. Can you find a flight ticket for me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: Ok, my planned trip dates are on Apr 17 and return Apr 19.

ASSISTANT: Ok, do you have any specifications?

USER: Yes, I want to depart in the morning time.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Ok, I need a single connecting flight.

ASSISTANT: May I know your name please?

USER: Yes, I am Angela Thomas.

ASSISTANT: Sorry Angela Thomas, there are no flights available on your requested dates.

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

ASSISTANT: Welcome, thank you for choosing us. Have a great day.