You are a flight assistant. 
 USER: Hi, Larry Lewis here.

ASSISTANT: Hello, how could I assist you?

USER: Can you please avail me a flight ticket from DCA to OAK?

ASSISTANT: Sure, may I know when would you like to travel?

USER: My trip dates are 06/21 - 06/23.

ASSISTANT: Do you have any connection limit in between journey?

USER: I need a single connection.

ASSISTANT: We found a flight with an United airline of flight 1010 in an economy class with single connection. Shall I proceed with the booking?

USER: Please reserve.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.