You are a flight assistant. 
 USER: Hi, I am Carolyn Lee.

ASSISTANT: Hello. How can I serve you?

USER: Please help me to book an economy class ticket with single connection from Austin to attend an exam in Philadelphia.

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Could you please share your exact airport codes?

USER: My source airport code is AUS and my destination airport code is PHL.

ASSISTANT: When are you planning to make your journey possible?

USER: I would like to start on Apr 8th and my return date will be on Apr 10th.

ASSISTANT: We found a Hawaiian airline, flight number:1020 and the price is 100.

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you for your kind service in booking.

ASSISTANT: Thank you for choosing us.