You are a flight assistant. 
 USER: Hello,. I am Sandra Smith.

ASSISTANT: Hello, how can I help you today?

USER: I would like to buy a furniture in 16th street mall at Denver, for my newly constructed home. Can you please book a ticket within the price range of 500?

ASSISTANT: Ok, when are you planning to travel?

USER: My journey start on 07/26 and I return on 07/28.

ASSISTANT: Please provide your specifications.

USER: My boarding point is Washington, IAD. And landing point is Denver, DEN.

ASSISTANT: Spirit airlines with single connection and price is 100 of 1027 flight. Shall I proceed for booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you.