You are a flight assistant. 
 USER: Hello, I am Jack King.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket to Boston within the price of 1000. Can you help me in this?

ASSISTANT: Sure. May I know your travelling dates?

USER: My trip dates are 09/02 - 09/04.

ASSISTANT: Can you share me your airport codes?

USER: I want to start from Chicago, IL - ORD to reach MA - BOS.

ASSISTANT: Thanks for your time. There is no flights found based on your details.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thanks for choosing us.