You are a flight assistant. 
 USER: Hello, I am Donna Anderson.

ASSISTANT: Hello, how may I support you today?

USER: I want to attend my sister's baby shower at LAX, can you please book a ticket for me?

ASSISTANT: Sure, I will help you to book flight ticket to LAX. Please share me on what dates would you like to travel?

USER: My depart is on 10/26 and return is on 10/28.

ASSISTANT: May I know your source airport code?

USER: Source: PHL.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: May I know your budget for flight ticket?

USER: Price limit:500.

ASSISTANT: Thanks for the details, sorry to inform you there is no any flight available on your journey data.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day ahead.