You are a flight assistant. 
 USER: Hello. I am Margaret Hall.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket to Houston TX-HOU, help me in booking my flight ticket from Washington.

ASSISTANT: Sure, let me know your travelling dates?

USER: My journey dates will be 12/01 to 12/03.

ASSISTANT: Could you please share me your source airport code?

USER: My source point will be DC-IAD.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a lay by.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, we found a Delta airline with fare 200 and a halt in between the journey. Shall I proceed?

USER: You can reserve.

ASSISTANT: Your ticket has been confirmed with flight number 1012.

USER: Thank you.

ASSISTANT: Thanks for choosing us.