You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to attend a Seminar in Dallas. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, May I know your travelling dates? D.

USER: My travelling dates are May 27 and May 29.

ASSISTANT: Let me know your source code.

USER: My airport codes are ATL and DFW.

ASSISTANT: Do you have any preferences?

USER: I prefer single connecting flight.

ASSISTANT: May I know your name?

USER: My name is Debra Martinez.

ASSISTANT: You have a connecting flight 1023 in UA airlines and price 200, Shall I proceed?

USER: Please proceed.

ASSISTANT:  Your ticket has been processed and it will be send to your Email-Id shortly.

USER: Thanks for helping me.

ASSISTANT: Thank you.