You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please help me out in booking the ticket from IAD to LAX.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates will be Feb 5 to Feb 7.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: Karen Gonzalez is my name.

ASSISTANT: We found a flight in an airline Spirit with 1028 number having a single connection in an economy class. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.