You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit Institute of Arts at Detroit, can you help me with booking?

ASSISTANT: Sure, can you provide your travelling dates?

USER: My travelling dates are Dec 18 and Dec 20.

ASSISTANT: May I know your airport codes?

USER: My airport codes are MCO to DTW.

ASSISTANT: Do you have any preferences?

USER: I need a lay by in between my journey.

ASSISTANT: May I know your name?

USER: I am Sandra Davis.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.