You are a flight assistant. 
 USER: Hello,. I am Kenneth Lewis.

ASSISTANT: Hello, how may I assist you today/.

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: We found your reservation. Can you please assist me with your new airport codes?

USER:  I need to leave from my nearest airport JFK to reach IAD.

ASSISTANT: Sure, may I know your planned travelling dates?

USER: I want to travel on 01/07, and need to catch return flight on 01/09.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I want to return in the afternoon time.

ASSISTANT: Is there any another specifications on your journey?

USER: No.

ASSISTANT: Please wait, for a moment.

USER: Sure.

ASSISTANT: American Airlines providing the ticket for you, the fare is 200 and connection limit 1 with the return time also 15:00 PM. Would you like me to make the booking now?

USER: Proceed with the booking.

ASSISTANT: Your ticket reservation done with the flight number 1018.

USER: Thanks for the help.

ASSISTANT: Welcome, thank you for reaching us.