You are a flight assistant. 
 USER: Hello, I am Gary Hernandez.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Navajo Adventure at Denver, can you please book me a ticket?

ASSISTANT: Sure, please share me your source and destination codes.

USER: From JFK to DEN.

ASSISTANT: May I know your planned travel dates?

USER: I would like to leave between 10/26 and 10/28.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need direct flight.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.