You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Joseph Evans.

ASSISTANT: How may I help you?

USER: I would like to meet my uncle at Oakland, will you help me in booking the flight ticket from DEN to OAK?

ASSISTANT: Sure, let me know your journey dates?

USER: My travelling dates are 02/19 and 09/21.

ASSISTANT: Do you need any specifications?

USER: I need a flight with single connection.

ASSISTANT: Can you please provide your return date?

USER: There is a change in my return travel dates is 02/21.

ASSISTANT: Sure, please hold on a moment.

USER: Ok, I will wait for your response.

ASSISTANT: We found a UA airline with the ticket fare of 100 and a halt in between the journey. Shall I proceed?

USER: Sure, you can proceed with the booking.

ASSISTANT: Your ticket has been confirmed by flight number 1016 and an economy class.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.