You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Please book a ticket from DCA to LAX to attend Client meeting.

ASSISTANT: Sure, when are you willing to travel?

USER: My travelling dates are Nov 4 and Nov 6.

ASSISTANT: May I know your good name please?

USER: I am Anthony Davis.

ASSISTANT: Do you have any preferences for this trip?

USER: I want single connection.

ASSISTANT: We found a flight in an airline Frontier with 1020 number having a direct connection in an economy class. Shall I reserve it for you?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.