You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in reserving the ticket from ATL to OAK?

ASSISTANT: Sure, please provide your trip dates.

USER: I would like to travel on Aug 28 and again I will return back on Aug 30.

ASSISTANT: Which class do you prefer?

USER: I am comfort to travel in any class.

ASSISTANT: May I know your name?

USER: Myself David Clark.

ASSISTANT: Do you have any specifications?

USER: I want to return in the evening.

ASSISTANT: Hawaiian airlines with flight 1000 is providing a connecting flight and ticket costs you 100 in economy class.

USER: Yes, please go ahead and reserve the ticket.

ASSISTANT: Your ticket is confirmed David Clark. Flight departs at 3:00 hours and arrives at 15:00 hours.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thank you for reaching us.