You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am William Green. Can you help me in changing my recent reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: We found a reservation on your name. May I know your planned trip dates?

USER: Nov, 2 and Nov, 4 are my planned trip dates.

ASSISTANT: Can you please share your airport codes?

USER: DCA and LGA are my airport codes.

ASSISTANT: Do you have any connection limit?

USER: I need single connection.

ASSISTANT: May I know your arrival and depart timings?

USER: My return time should be at afternoon.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: We found a direct flight of fare 200 with number 1004 and airline Hawaiian. Can I proceed?

USER: Please go ahead.

ASSISTANT: Your ticket has been confirmed in economy class and return is in the afternoon at 19:00 PM.

USER: Thank you.

ASSISTANT: Thank you.