You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Scott Martin here. I want to attend a Seminar in Seattle. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: My travelling dates are from 04/22 to 04/24.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from LGA to SEA.

ASSISTANT: Sorry, no flight is available for you as per your requests. Thank you for reaching us, have a nice day.

USER: Thanks for the information.