You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Edwards.

ASSISTANT: How may I help you today?

USER: I am planning to visit Oakland, can you please book me the ticket from DCA to OAK?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: I want to depart on Nov 13 and would like to return on Nov 15.

ASSISTANT: Do have any specifications?

USER: Yes, I need a connecting flight in between my route.

ASSISTANT: I have found a flight  with the Delta airlines having a connection limit 0. Can I proceed with the booking?

USER: That's ok for me. Please book my ticket with this airlines.

ASSISTANT: Yes, your ticket is reserved with the flight number 1012.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us. Have a great journey.