You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a flight ticket from LAX to IAD?

ASSISTANT: Sure, may I know your good name?

USER: I am Ryan Carter.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are 14 to 16 of Nov.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: We found a connecting flight 1009 from Spirit airline has fare 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.