You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Melissa Edwards. I want to book a flight ticket from DFW to ORD. Could you help me in booking.

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are from Oct 10-12.

ASSISTANT: May I know the connection limit please?

USER: I need 1 connecting flight.

ASSISTANT: Can I know the departure and return time please?

USER: My depart time should be in the evening.

ASSISTANT: Do you have any requirements?

USER: No.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.