You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you for the day?

USER: I need to travel to Phoenix, PHX from Washington IAD to meet my girlfriend. Can you book me a flight?

ASSISTANT: Sure,can you please help me by providing your dates of travel?

USER: I would like to travel 02/28 to 03/01.

ASSISTANT: Do you have any price and connection limit?

USER: The price limit should be 200. I need a flight of single connection.

ASSISTANT: Ok,please wait a moment.

USER: OK.

ASSISTANT: To move further may I know your name?

USER: I am Brenda Smith.

ASSISTANT: Sorry, I found no flights were available in your specifications. Thank you for opting us. Have a nice day.

USER: OK, that's alright. Thank you for helping me.