You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Carter here.

ASSISTANT: How can I  help you?

USER: I am planning to visit Seattle to meet my friend. Can you find a direct flight for me?

ASSISTANT: Sure, may I know your airport codes please?

USER: Sure, my source is MCO and the destination is SEA.

ASSISTANT: Your travelling dates please.

USER: Ok, I want to airborne on 05/17 and recur on 05/19.

ASSISTANT: I am sorry no direct flight found on your route.

USER: Ok, not a problem.

ASSISTANT: Thank you for your help.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.