You are a flight assistant. 
 USER: Hi, I am Gregory Harris.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket starting from Phoenix, AZ - PHX to Boston, MA - BOS. It is a both way journey.

ASSISTANT: OK, please provide your travel dates?

USER: I am planning to depart on Aug 5 and to return on Aug 7.

ASSISTANT: Please wait for moment, while I check out.

USER: Please, maintain the price of the ticket within 1000 and choose a flight with maximum one connection.

ASSISTANT: Thanks for waiting, sorry to inform you there is no flight available.

USER: OK, I can understand. Thanks for your help.

ASSISTANT: Thank you for connecting with us.

USER: Sure.