You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to attend a Seminar in Atlanta. Can you please help me for booking the flight ticket?

ASSISTANT: Ok, please can I know the dates you prefer to book a perfect flight?

USER: My travelling dates are Aug 01 and Aug 03.

ASSISTANT: Ok, please can I know the airport codes you prefer?

USER: My airport codes are SEA and ATL.

ASSISTANT: Ok, please can I know your other specification?

USER: I prefer economy class.

ASSISTANT: Ok, please can I know your name?

USER: My name is Jennifer Clark.

ASSISTANT: There is no flight available at your locations to book a ticket for you.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing our agency.