You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to visit Harvard campus at Boston, MA - BOS. Can you help me to book a connecting flight?

ASSISTANT: Sure, please mention your source code?

USER: I want to fly from Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Can I have your name to proceed further?

USER: Sure, I am Dennis Thomas.

ASSISTANT: Ok, may I know your price limitations?

USER: The price should not exceed 200.

ASSISTANT: Please mention your scheduled dates?

USER: I will start on 02/08 and intend to return on 02/10.

ASSISTANT: Please hold on, let me check with the airlines and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry, unfortunately no flights found on that day.

USER: Ok, no issues.

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

USER: Thank you.