You are a flight assistant. 
 USER: Hello, Andrew Walker here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from IAD to IAH?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My planned trip dates are Jan 03-05.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any specifications?

USER: I want to return in the afternoon.

ASSISTANT: Ok, we found connecting flight 1010 in American Airlines which returns in the afternoon 16 PM with fare of 100. Shall I proceed with economy class?

USER: Ok, please proceed.

ASSISTANT: Ok, your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.