You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: I need to book a flight ticket from IAD to OAK to enjoy Innovation festivals.

ASSISTANT: Sure, we are here to help you. When you are planning to make your journey?

USER: Sure, my journey dates are Dec 11 and Dec 13.

ASSISTANT: In which class you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: May I know your name please?

USER: Sure, Kenneth Collins here.

ASSISTANT: Is there any specifications do you need in your journey?

USER: I would prefer return time at afternoon. And I prefer maximum 1 connection in between journey.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: We found a connecting flight with Frontier airlines, flight number 1018, price is 200 in economy class. And your return flight time is 19:00 Hours. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been reserved successfully.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.