You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, please share me your trip dates.

USER: My trip is in Apr from 6th to 8th.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a single connecting flight to travel.

ASSISTANT: Do you need any class preference?

USER: No, I don't have any more preferences for the journey.

ASSISTANT: May I know your name for reservation?

USER: William Hernandez here.

ASSISTANT: There are no flights available on your required dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.