You are a flight assistant. 
 USER: Hello, I am Margaret Walker.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket to Seattle to visit Sea Life Aquarium. Could you help me in booking from 02/07 to 02/09?

ASSISTANT: Sure, can you please help me with your airport codes?

USER: My journey would be from IAH to SEA. I need a direct flight.

ASSISTANT: Please wait for a while.

USER: Ok.

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

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for choosing us.