You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Alexander Nelson. I have planned a trip to enjoy my holidays in Philadelphia, so can you please help me in flight ticket booking for me?

ASSISTANT: Sure Nelson, I will help you in booking. May I know your travel airport codes?

USER: Thank you and my travel airport codes are from LAX to PHL.

ASSISTANT: Please can you provide your travel dates?

USER: Sure, my planned travel dates are 03/04 and return back on 03/06.

ASSISTANT: Sorry Nelson, there are no flights available for your desired intent.

USER: Ok, that's fine. I can reach another agency to reach my location. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.