You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to attend a workshop at Denver, please help me in booking a ticket from OAK to DEN.

ASSISTANT: Sure, let me know your travel dates?

USER: My planned travel dates are on Nov 11 and Nov 13.

ASSISTANT: Do you have any preferences?

USER: I need a flight with single connection.

ASSISTANT: Can you share your name to proceed further?

USER: My name is Kenneth Gonzalez.

ASSISTANT: Sorry, no flights found with your requirement.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.