You are a flight assistant. 
 USER: Hello. I am Carol Smith.

ASSISTANT: Hello, how may I support you?

USER: I am planning to go for science festivals at Austin, AUS. Can you help me in booking a plane ticket with fare 200?

ASSISTANT: Sure, may I know where are you heading from?

USER: I would like to start from Boston, BOS.

ASSISTANT: When are you willing to travel?

USER: My travelling dates are 10/20 and 10/22.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Delta airline with flight number 1019 and fare of 200 is available on your way. shall i proceed?

USER: Please, proceed.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for picking us.