You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Mitchell here.

ASSISTANT: How can I help you  at this moment?

USER: please look for a direct flight from PHL to LAX.

ASSISTANT: Sure, I am here to help you. Could you please share your journey dates?

USER: My planned dates are Dec 1 st and Dec 3rd respectively.

ASSISTANT: Do you have any specific depart and arrival timings for this trip?

USER: I prefer evening flight for return journey.

ASSISTANT: Do you have any class preference for this trip?

USER: No, I don't have any class preference.

ASSISTANT: May I know your airline preference for this trip?

USER: I am ok with any Airline.

ASSISTANT: Anna Mitchell, there are no flight services are available on this route on your provided dates.

USER: That's fine, thank you for checking.

ASSISTANT: Thank you for contacting us.