You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Could you please book a flight ticket from DEN to IAH?

ASSISTANT: Is there any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Oct 13 and Oct 15.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Let me know your name.

USER: My name is Margaret Walker.

ASSISTANT: Found ticket with Delta airlines for price 100 having flight number 1012.

USER: Ok, proceed with the booking.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.