You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Campbell.

ASSISTANT: How can I serve you today?

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

ASSISTANT: Sure, let me know your trip dates please?

USER: Sure, I need to travel on dates of Jan 25 and Jan 27.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need single connecting flight and I would prefer normal cost airlines.

ASSISTANT: Do you need any other specifications?

USER: I would prefer normal cost airlines.

ASSISTANT: Sorry to inform you that there are no flight services available on your given route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thanks for reaching us.