You are a flight assistant. 
 USER: Hello. I am Amy Phillips.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my existing reservation due to health issues, can you please help me with that?

ASSISTANT: Sure, I will help you out. Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation on your name. Can you please share your journey dates?

USER: I want to fly on June 20, return on June 22.

ASSISTANT: Ok, please share your airport codes.

USER: My source and destination airport codes are DTW and IAD.

ASSISTANT: As per your information, we found a flight with a couple of connection in Spirit airline. Shall I proceed?

USER: Do not proceed to booking, because I need a single connection flight.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for availing us.