You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Collins.

ASSISTANT: How can I serve you?

USER: I need your help in searching a flight from Washington to reach Dallas & Fort Worth, Can you please help me out?

ASSISTANT: Sure, I am blissful to help you.

USER: Thank you.

ASSISTANT: May I know your airport codes?

USER: The airport codes are IAD and DFW.

ASSISTANT: Can you share your travel dates?

USER: The preferable travel dates are 04/22 and 04/24.

ASSISTANT: Do you have any specifications?

USER: Yes, I need single connecting flight.

ASSISTANT: According to your information we found a  connecting flight with fare 100 and number 1010. Shall I proceed?

USER: Yes, please proceed with ticket booking.

ASSISTANT: Your flight ticket has been confirmed with airline AA.

USER: Thank you for helping me.

ASSISTANT: Thank you for opting us.

USER: You are welcome.