You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to meet my brother at Dallas, will you help me in booking the flight ticket from SEA to DFW?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are Dec 16 and Dec 18.

ASSISTANT: Do you have any requirements?

USER: No, thank you for asking.

ASSISTANT: There is a direct flight 1002 of American Airlines, can I proceed?

USER: You can proceed booking with the name Carol Williams.

ASSISTANT: Your booking is done in economy class.

USER: Thank you for helping me.

ASSISTANT: Welcome.