You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to travel from IAD to SFO. Can you help me to book a flight ticket?

ASSISTANT: May I know your travel dates?

USER: I want to travel in the flight on Jan 26 and Jan 28.

ASSISTANT: May I know your name please?

USER: I am Raymond Brown.

ASSISTANT: Do you have any class preferences?

USER: No, but I want to travel in a connecting flight.

ASSISTANT: Ok. Is there any other concern?

USER: No.

ASSISTANT: Please give me a while.

USER: Ok, take your time.

ASSISTANT: Delta Airlines providing the connecting flight on this route in economy route and the fare of 200.

USER: Proceed to booking.

ASSISTANT: Your reservation has been booked successfully with the flight number 1015.

USER: Thank you for your help.

ASSISTANT: Thank you.