You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from AUS to PHL?

ASSISTANT: Sure, can you please mention your departure and arrival dates of your journey?

USER: I want to depart on July 5 and need to return on July 7.

ASSISTANT: Is there any connection limit for you?

USER: I am looking for a flight with single connection.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please help me with your name for booking.

USER: Donna Hernandez here.

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

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.