You are a flight assistant. 
 USER: Hi, I am Paul Nelson.

ASSISTANT: Hello,. How may I help you?

USER: I am planning to celebrate my birthday with my grand parents at DEN.Can you please book a flight for me?

ASSISTANT: Please provide your departure code?

USER: My origin point is JFK.

ASSISTANT: Ok. Please provide your travel dates?

USER: I want to fly on 07/23 to 07/25.

ASSISTANT: Connecting flight 1003 with airline UA, price 100 can be booked.

USER: Yes, book it.

ASSISTANT: Ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thanks.