You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me to book a economy class flight?

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates are June 23 and 25.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My airport codes are EWR and LAS.

ASSISTANT: Do you have any other requirements?

USER: I want to return at afternoon. I prefer connecting flight.

ASSISTANT: Delta airline providing a connected flight in economy class. Sorry, it's a direct flight.

USER: Proceed with booking under my name Ruth Nelson.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you.