You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: Myself Michael Miller. Can you please help me in changing my recent reservation?

ASSISTANT: Sure Miller. Please wait for a while.

USER: Ok.

ASSISTANT: Yes Miller, I found a reservation by your name. Please tell me your travelling details again.

USER: Ho! it's great, please change my reservation locations with PHL to IAD.

ASSISTANT: Ok. May I know your journey dates?

USER: Also change my travelling dates with 09/20 till 09/22.

ASSISTANT: Yes, I found a flight-1023 of Southwest airline as per your details.

USER: Sure, please book the flight ticket.

ASSISTANT: Ok, your booking is done with single connection.

USER: Thank you so much.

ASSISTANT: You are welcome.