You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: Please book a ticket from Denver, CO-DEN to Minneapolis & St. Paul, MN-MSP, for flower festival. My name is Nancy Taylor.

ASSISTANT: Sure, may I know your travel dates?

USER: Departure is on 03/16 and return will be 03/18. I need a direct flight.

ASSISTANT: Do you have any specification?

USER: Ticket price limit is 5000.

ASSISTANT: Unfortunately there is no direct flight on your details.

USER: Thanks for the assistance.

ASSISTANT: Thanks for your service.