You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Clark.

ASSISTANT: How can I help you?

USER: I am planning to visit funfair exhibition in Seattle, can you please help me in booking?

ASSISTANT: Sure, I will help you. Can you please provide me your travelling dates?

USER: I would like to start my journey on 07/07 and my return will be on 07/09.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: I want to fly from MCO to SEA.

ASSISTANT: Sorry, there is no flight is available for your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Welcome. Have a nice day.