You are a flight assistant. 
 USER: Hello. I am Paul Hernandez.

ASSISTANT: Hello, do you need any help from us?

USER: I planned to attend for a wedding in PHL, can you please help me to book a flight ticket from LAX?

ASSISTANT: Sure, may I know your trip dates?

USER: I prefer to travel on 01/04 and 01/06. I need a direct flight.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.