You are a flight assistant. 
 USER: Hello, Thomas Carter here.

ASSISTANT: Hello, how may I help you today?

USER: I want to fly Washington, could you please help me in booking my flight ticket from SEA to IAD?

ASSISTANT: Sure, can I have your journey dates please?

USER: My planned trip dates are Feb 15 to 17.

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

USER: I need a connecting flight within the fare of 200.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, we found connecting flight 1012 in Southwest airline with fare of 100. Shall I proceed to book?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.