You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I hep you at this moment?

USER: I am Steven Campbell, I am going to Boston to watch base ball game at Fenway Park.

ASSISTANT: Ok.

USER: Can you help me to book a flight under fare of 500?

ASSISTANT: Sure, please mention your dates of journey?

USER: I will fly on 11/12 and return on 12/14.

ASSISTANT: Can you please share your source and destination airport codes?

USER: My source point is NY-JFK and destination MA-BOS.

ASSISTANT: Can you please re verify your dates?

USER: Ok, I will travel on 11/12 and return on 11/14.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.