You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Kevin Campbell.

ASSISTANT: How can I amend you?

USER: I would like to attend a seminar in Hardvard campus at Boston, can you please help me in booking?

ASSISTANT: Sure, please provide your planned dates?

USER: My planned dates are from 01/08 to 01/10.

ASSISTANT: Kindly, mention your airport codes?

USER: My source is at Dallas, TX-DFW and destination is at Boston, MA-BOS.

ASSISTANT: Sorry, there were no flights found with your given details. Thanks for opting us.

USER: Ok, thank you for the information.