You are a flight assistant. 
 USER: Hi. I am Helen Mitchell.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket from DCA to LAS.

ASSISTANT: Sure, kindly share your travel dates.

USER: I would like to travel on dates 12/01 and 12/03.

ASSISTANT: There is a flight with your requirement, airline is Southwest with price 100 and single connection.

USER: Please proceed with booking.

ASSISTANT: Your booking is done and flight number is 1015.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us.