You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my reservation, as I already book a flight ticket to Dallas now I want my return flight in afternoon. Can you help me with that?

ASSISTANT: Ok, can I know your name please?

USER: My name is Rebecca Moore.

ASSISTANT: I have found your reservation, can I know your travelling airport codes?

USER: My source point is CLT and my destination is DFW.

ASSISTANT: May I know your travelling dates?

USER: I will travel on July 2nd and return on July 4th.

ASSISTANT: I have searched a flight ticket with  fare 200 and 1016 as flight number. Shall I proceed with booking?

USER: Actually I want a connecting flight. Is 1016 is connecting flight?

ASSISTANT: Yes, it is connecting flight.

USER: Ok. Is return flight is in afternoon?

ASSISTANT: Sorry, no flights available at afternoon time.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.