You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Is there any availability of flights to DCA in economy class?

ASSISTANT: Sure, I will check and let you know in the mean while may I know your trip dates?

USER: My trip dates are on June 14 and 16.

ASSISTANT: Help me with the source code? Do you have any preferences?

USER: I am boarding from LAS. I need a connected flight.

ASSISTANT: May I know your name please?

USER: Sure, my name is Lisa Collins.

ASSISTANT: There is a flight in an airline United with 1008 number having a single connection price of 100. Shall I reserve it?

USER: Sure, please go ahead for booking in United Airline.

ASSISTANT: Your flight ticket has been reserved.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us.