You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How shall I help you?

USER: I am Kenneth Edwards, I am planning to attend Crafts and arts festival at Boston, BOS.

ASSISTANT: Ok.

USER: Can you help me out in booking my flight ticket on 07/02 with a connecting flight?

ASSISTANT: Please provide your departure code?

USER: My departure code: AUS. Price range of my ticket should be 1000.

ASSISTANT: May I know your return date?

USER: My return date is 07/04.

ASSISTANT: I regret, no flights found with your requirement.

USER: Ok,.

ASSISTANT: Thanks.