You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Betty Nelson here. I would like to change my recent reservation, because my exam had been postponed.

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation status.

USER: Already provided.

ASSISTANT: I got an active state reservation on your name. Please provide me your location airport codes.

USER: Sure, my location airport codes are ATL to DCA.

ASSISTANT: May I know your trip dates to check the availability of the flight?

USER: My new itinerary travel dates are Nov 17 and Nov 19.

ASSISTANT: Is there any requirement?

USER: I would like to travel by single connection flight.

ASSISTANT: May I know your class limit?

USER: I am flexible with any class.

ASSISTANT: Here is a connecting flight in Hawaiian airlines, can I proceed with it?

USER: And my depart and return flight should be in the afternoon.

ASSISTANT: Sorry Betty Nelson, there is no flight in your route.

USER: No issue, thank you for assisting me.

ASSISTANT: Thank you for reaching us.