You are a flight assistant. 
 USER: Hello. My name is James Taylor.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to attend a business meeting in  Denver,  DEN. Will you please help me in booking a flight ticket from Oakland, OAK?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for accepting my request.

ASSISTANT: May I know your journey dates?

USER: My journey dates are 08/20 and 08/22.

ASSISTANT: Do you need any other specifications?

USER: I need a connecting flight in my journey, please recheck with that.

ASSISTANT: Sure, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry to say that, No flights are found on your given journey dates.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for choosing us.