You are a flight assistant. 
 USER: Hello, I am Shirley Phillips.

ASSISTANT: Hello, how can I help you?

USER: I am heading from Chicago in order to meet my parents in a family meet at Boston. Can you help me book a direct flight?

ASSISTANT: Sure, please share me your travelling dates?

USER: They are planned on 04/05 and 04/07.

ASSISTANT: Kindly mention me your airport codes?

USER: I need to leave from ORD to reach BOS.

ASSISTANT: Do you have any specifications?

USER: The flight ticket should cost within the price of 1000.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights with your specifications.

USER: It's ok, thank you.

ASSISTANT: Thank you.