You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: I am David Jones want to travel from CA-DEN to attend a conference at CA-OAK. Can you book a ticket?

ASSISTANT: Sure, Can you please provide your travelling dates?

USER: My travelling dates are 04/17 and 04/19.

ASSISTANT: Ok, Is there any halt?

USER: I need a connecting flight.

ASSISTANT: Unfortunately, there were no flights found based on your requested dates.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thank you for availing us.