You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a ticket from Philadelphia, PA-PHL to Austin, TX-AUS.

ASSISTANT: Yes, can you tell me your dates of travel?

USER: Sure. Depart is by 08/22 and will return by 08/24.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Thanks.

ASSISTANT: Can I know your name for documentation?

USER: I am Kenneth Lopez.

ASSISTANT: Thank you for reaching us.