You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to reserve my ticket from AUS to PHL, can you please help me in booking?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my planned dates of journey are from Jan, 16 to Jan, 18.

ASSISTANT: May I know your connection limit?

USER: I want to fly in a direct flight.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Nancy Phillips.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for contacting us.