You are a flight assistant. 
 USER: Hello, I am Christopher Harris.

ASSISTANT: Hello, how may I aid you today?

USER: I want to attend my family meeting at SFO, please book me a ticket from LGA?

ASSISTANT: Sure, let me know your travelling dates?

USER: I have planned to travel on 04/02 and 04/04.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: How much can you afford for your flight ticket?

USER: I can afford up to 5000.

ASSISTANT: We found flight 1005 price 200 in spirit airline with flight number 1005. Shall I proceed?

USER: Yes, please book this ticket.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.