You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please reserve a seat to Los Angeles, LAX?

ASSISTANT: Sure, may I know your source airport?

USER: I have to start from Detroit, DTW to attend my niece wedding.

ASSISTANT: Ok, please provide me your planned journey dates.

USER: I would like to travel on 03/04. And I will return on 03/06.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight. Price limit is 200.

ASSISTANT: May I know your good name please?

USER: I am Barbara Campbell.

ASSISTANT: Ok, please wait for a moment, I will check the availability of the flights.

USER: Sure.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok,Thank you.

ASSISTANT: Thank you for opting us.