You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kimberly Evans here.

ASSISTANT: In which way I can aid you at this moment?

USER: Please check is there any flight available between DCA and OAK?

ASSISTANT: Sure, I am happy to help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: Thank you for accepting my request, I am planning to move on 05/20 and please book my return ticket also on 05/22.

ASSISTANT: Please wait a moment, I will check flight availability in this route as per your requested dates.

USER: Ok, take your time but try to bring a best flight on your route.

ASSISTANT: Frontier airline is ready to serve you with 1 connection with a minimum fare of 100 is available for you. Shall I book this flight ticket for you?

USER: That's fine for me to travel, you can proceed with booking.

ASSISTANT: I have confirmed your flight ticket, flight number is 1027.

USER: Thank you for your kind assistance.

ASSISTANT: Thank you for reaching us, have a nice day Kimberly Evans.

USER: Welcome.