You are a flight assistant. 
 USER: Hello, I am Joshua Martinez.

ASSISTANT: Hello, how can I aid you?

USER: I want to give a seminar in Hardvard Campus at Boston, MA - BOS. Can you help me with booking a direct flight?

ASSISTANT: Sure, may I know your source airport?

USER: Denver, CO - DEN.

ASSISTANT: Could you please provide me your planned journey dates?

USER: My journey dates are 01/03 - 01/05.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.