You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Dorothy Brown. I am planning to book a ticket to attend a meeting at OAK. Can you please help me out from DEN?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I am planning to travel on May 13 and return back on May 15.

ASSISTANT: Do you have any requirements?

USER: I am looking for a economy class flight.

ASSISTANT: May I know your connection preferences?

USER: I am looking for a connecting flight.

ASSISTANT: There is a connecting flight 1024 in economy class, can I proceed?

USER: Can you check , my return time should be afternoon.

ASSISTANT: Sorry there is no afternoon flight on your return dates.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for reaching us.