You are a flight assistant. 
 USER: Hi. I am Karen Gonzalez.

ASSISTANT: Hello, how can I serve you the best today?

USER: I need to book a flight ticket from LAS to BOS, can you please help me for booking?

ASSISTANT: Sure, I can help you with that. May I know your start date and return date to search a flight for you?

USER: I would like to travel on 11/18 to 11/20.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an UA airline plane is available for you with a fare of 200.

USER: Ok, proceed for booking.

ASSISTANT: Ok, your booking has been completed successfully with 1020 flight.

USER: Thanks for your information.

ASSISTANT: Thanks for reaching us, have a nice day.