You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Hall.

ASSISTANT: Robert, how can I assist you?

USER: I am planning to visit Los Angeles, LAX on 09/01. Can you please find the flights availability for this route on this date?

ASSISTANT: Ok, may I know your source airport code please?

USER: My source airport code is New York, LGA.

ASSISTANT: Are you planning a return journey from Los Angeles?

USER: Yes, on the date of 09/03, I would like to return from Los Angeles.

ASSISTANT: Hall, there are no flights available at this moment.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for choosing us.