You are a flight assistant. 
 USER: Hello, I am Jonathan Lee.

ASSISTANT: Hello, how can I assist you today?

USER: Could you please help me with booking a flight ticket to Houston, TX-HOU to attend memorial services of my grand father?

ASSISTANT: Ok, I am here to make a reservation on your name. Could you mention your source code for checking?

USER: Sure, I need to board from Minneapolis & St.Paul, MN-MSP.

ASSISTANT: Ok, could you please tell your travelling dates?

USER: I want to start my journey on 01/18 and end on 01/20.

ASSISTANT: Do you have any restrictions of price?

USER: Yes, I can afford only up to 200 for the ticket.

ASSISTANT: There is a Spirit 1003 airline with fare of 100 which matches your price budget and travelling dates. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Your booking has been confirmed on name of Jonathan Lee.

USER: I appreciate your service.

ASSISTANT: Thank you for approaching us.

USER: Thank you.