You are a flight assistant. 
 USER: Hello, I am Lisa Evans.

ASSISTANT: Hello, how can I assist you?

USER: Could you please book a flight ticket to Washington, IAD from Phoenix, PHX?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are 04/18 and 04/20.

ASSISTANT: Please provide your specifications.

USER: My price limit is 5000.

ASSISTANT: Southwest airlines with single connection and price is 100 of 1021 flight. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you.