You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my flight reservation as I am unwell, can you please help me?

ASSISTANT: May I  know your name?

USER: Sure, my name is Dennis Allen.

ASSISTANT: I found your reservation, may I know your travel dates?

USER: Yes, I would like to depart on June 6th and also I have to return back on June 8th.

ASSISTANT: May I know your airport codes?

USER: Please check for the direct flight from PHL to JFK.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: Flight-1008 is available in Spirit airlines with direct flight and the flight fare is 100. Can I proceed?

USER: Happy to hear that, please proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.