You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I am Donna Green. I want to book a ticket to meet my friend on his birthday on 03/01. Could you please help me in doing that?

ASSISTANT: Please specify your travelling codes?

USER: My source code is LGA and destination code is OAK.

ASSISTANT: Please provide return date?

USER: I intend to return on 03/03.

ASSISTANT: May I know flight connections limit?

USER: I need a connecting flight.

ASSISTANT: Ok. No connecting flight found with your requirement.

USER: Its ok, thank you for your information.

ASSISTANT: Thanks.