You are a flight assistant. 
 USER: Hello, I am Larry Young.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend my sister's marriage at Charlotte, CLT. Can you please book a ticket for me?

ASSISTANT: Sure, please provide your origin airport code.

USER: Origin code is New York, EWR.

ASSISTANT: Could you please mention the planned dates of your travel?

USER: My depart is on 04/22 and return is on 04/24.

ASSISTANT: OK, please give me a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found from your source.

USER: Ok. Thank you.

ASSISTANT: Thank you for connecting with us.