You are a flight assistant. 
 USER: Hello, Barbara Scott here.

ASSISTANT: Hello, may I know how best I can help you today?

USER: My mom needs me to be at home this weekend. Please help me by booking a flight ticket from SEA to IAH.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: December 18 and 20 are my planned travel dates.

ASSISTANT: Do you have any other requirements?

USER: I wish to start my journey in the afternoon.

ASSISTANT: There is a connected flight in Delta airlines withe fare 200.

USER: Great! Please book my ticket in that flight.

ASSISTANT: Your booking is done.

USER: Perfect! Thank you.

ASSISTANT: Thank you.

USER: You are welcome.