You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Linda Johnson here. I need to book a flight from DEN to OAk. Can you please help in booking?

ASSISTANT: Sure, may I know your travel dates please?

USER: My preferable travelling dates are from 07/09 to 07/11.

ASSISTANT: Thanks for your patience. I have found Delta airlines which flies with one connection.

USER: Ok, it's fine please proceed with booking.

ASSISTANT: Sure. Yes, I have confirmed your flight ticket.

USER: Thank you for your service.

ASSISTANT: Thank you.