You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a direct flight from Philadelphia, PHL?

ASSISTANT: Sure. Please provide your travel dates?

USER: I would like to go for film festival on 09/02 and I intend to return on 09/04.

ASSISTANT: May I know your destination code?

USER: I have to reach to Phoenix, PHX.

ASSISTANT: Do you have any specifications?

USER: I can go with a fare of 5000.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there were no direct flights available from your source.

USER: Ok, thanks for your quick response.

ASSISTANT: May I know your name?

USER: I am Nicholas Anderson.

ASSISTANT: Thank you for reaching us. Have a good day.