You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I need to attend a conference at Seattle, SEA. Can you please book a ticket with the name of Karen Moore?

ASSISTANT: Sure, may I know your source code?

USER: I want to start from my nearest airport Chicago, ORD.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are from 08/10 to 08/12.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: No problem. Thanks you for the information.

ASSISTANT: Thank you.