You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: My name is Jonathan Allen.

ASSISTANT: How can I assist you?

USER: I would like to go from Orlando to Detroit, can you please book me a ticket with the price of 500?

ASSISTANT: Sure, can you please provide your airport codes?

USER: My airport codes are from MCO to DTW.

ASSISTANT: Can you please provide your travel dates?

USER: My travelling dates are from 04/18 to 04/20.

ASSISTANT: Please wait for a minute, I will check and let you know the details.

USER: Ok.

ASSISTANT: Sorry there were no flights found matching with your specifications.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thank you.

ASSISTANT: Have a good day.