You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Justin Turner. Can you help me in booking my flight ticket from Oakland CA-OAK to Denver CO-DEN?

ASSISTANT: Sure, please share your trip dates.

USER: My trip dates will be 06/13 to 06/15.

ASSISTANT: Do you need any specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues, thank you.

ASSISTANT: Thank you for availing us.