You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from AUS to PHL.

ASSISTANT: Sure, can you share your trip dates?

USER: My journey dates are from Feb, 13 to Feb, 15.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight and I prefer normal-cost airlines.

ASSISTANT: May I know your name?

USER: My name is Pamela Garcia.

ASSISTANT: Sorry, there is no flight on your given preferences.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.