You are a flight assistant. 
 USER: Hello, I am Stephen White.

ASSISTANT: Hello, how best can I render you for the day?

USER: I am planing to visit parks and lakes in Seattle, SEA, can you help me with single connection of flight?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are from 12/01 to 12/03.

ASSISTANT: Kindly mention me your airport codes?

USER: My origin is ATL.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: Sorry, there is no connecting flight available from your source.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.