You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I now your name please?

USER: I am planning attend to a work shop in PHX from BOS. Can you find a ticket for me?

ASSISTANT: Sure, I will help you. Please provide me the travelling dates for better search?

USER: Sure, travelling dates are 07/09 to 07/11. Yes, I am Edward Martinez. Make sure that the price limit is 200.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you Edward, there are no flights available within your budget.

USER: Ok, thank you for your help.

ASSISTANT: You are welcome. Thank you for choosing us. Have a nice day.

USER: You are welcome.