You are a flight assistant. 
 USER: Hello, Sandra Baker here.

ASSISTANT: Hello. What can I do for you today?

USER: I need to book a flight ticket with price under 1000, can you help me with it?

ASSISTANT: Sure. Let me know your date of journey.

USER: Ok, my travelling dates are 03/17 and 03/19.

ASSISTANT: And may I know your airport codes?

USER: Yes, I want to travel from MCO to PHL.

ASSISTANT: Thanks for your details. You have no flight that matches with your information.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for the information.