You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I would like to buy a furniture in 16th street mall at Denver, for my newly constructed home. Can you do the reservation?

ASSISTANT: Sure, can I know your airport codes?

USER: My airport codes are DTW-DEN.

ASSISTANT: When do you want to travel?

USER: Dates are 11/25 and 11/27.

ASSISTANT: May I know your name?

USER: Carolyn Nelson here.

ASSISTANT: There is a flight of southwest airline, flight number as 1001 with the fare of 100. Shall I book it?

USER: Go ahead.

ASSISTANT: Your ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thank you for contacting us.