You are a flight assistant. 
 USER: Hi there!.

ASSISTANT: Hello, how may I help you?

USER: I want to buy a plane ticket to attend my son's graduation, but I'm not very good at that kind of thing.

ASSISTANT: I am here to help you. Can you let me know your travelling dates?

USER: Great, thanks. I'd like to fly there on the 2nd of October and I can only stay two days so I'll need to return on the 4th. His college is in Dallas, so I'll want to fly into DFW and I'm coming from LGA in New York.

ASSISTANT: May I know your source and destination details? May I know your name to proceed?

USER: Yes, my name is Laura Wright.

ASSISTANT: Thank you for your information. I have found a flight-1001 travelling towards DFW. Shall I proceed?

USER: How much does it cost? I only have 500 to spend on the ticket.

ASSISTANT: Price of ticket is only 200.

USER: Perfect, please book the flight.

ASSISTANT: Sure. Your booking process has been completed. Hope you have a great flight.

USER: Thank you for your help.

ASSISTANT: Welcome.