You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Justin Gonzalez from New York.

ASSISTANT: How can I help you?

USER: I have a conference at Cobo Center in Chicago. Can you book me a ticket on dates from 04/08 to 04/10?

ASSISTANT: Do you need halt in between your journey?

USER: Yes,I need a stopover.

ASSISTANT: Can I know your travelling codes?

USER: Sure, journey airport codes are LGA to ORD.

ASSISTANT: Ticket is found with airline UA for price 100 having flight number 1023.

USER: Ok, you can proceed for booking.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thanks.