You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Nicholas Allen. I have to attend my friend's wedding at Atlanta, could you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: I would like to take off on 06/13 and return on 06/15.

ASSISTANT: May I know your nearest airport codes of travelling?

USER: My nearest source airport code is SEA and destination airport code is ATL.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Nicholas Allen, there are no flights available on your provided dates on this route.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for contacting us.

USER: Anyways, thank you for the information.