You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to book a flight in business class to reach Philadelphia?

ASSISTANT: Sure, Can you please share your source airport code?

USER: Sure, my source airport code is LAX.

ASSISTANT: Kindly, mention your planned trip dates.

USER: My trip dates are on June 24th to 26th.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: Sure, my name is William Walker.

ASSISTANT: There are no flights found on your specified travel dates.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing our travel agency.