You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you please book me a flight ticket from LGA to DEN to meet my family?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I have planned to travel on Oct 01st and return on Oct 03rd.

ASSISTANT: Do you have any other specifications?

USER: I like direct flight.

ASSISTANT: Please help me with your name for booking.

USER: Nicole Martin.

ASSISTANT: There is a direct flight with flight number 1004 with price is 100, can I proceed with that?

USER: Ok, please book it.

ASSISTANT: Your booking is done.

USER: Thank you.