You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please help me to book a ticket from DCA to DEN?

ASSISTANT: Sure, I am here to help you. Let me know your travel dates.

USER: I would like to travel on Sept 08 and Sept 10.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: Provide me your name to proceed further.

USER: My name is Gregory Parker.

ASSISTANT: Delta airlines is providing you the direct flight in economy class, shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been reserved with flight-1000.

USER: Thank you.

ASSISTANT: My pleasure.