You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket from DCA to DFW.

ASSISTANT: Sure, we are here to help you. May I know your trip dates?

USER: Sure, my journey dates are Mar 4 and Mar 6.

ASSISTANT: Do you need any break in your journey?

USER: I prefer maximum one connection.

ASSISTANT: May I know your depart and arrival time?

USER: I would prefer return time at morning.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, Christine Rodriguez here.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thank you for your assistance.