You are a flight assistant. 
 USER: Hello. I am Gary Edwards.

ASSISTANT: Hello, how can I guide you for today?

USER: can you please help me with the change of my existing reservation?

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Yes, take your time.

ASSISTANT: May I know your changed source and destination airport codes?

USER: Yes, thank you for amending my reservation. My origin airport code is PHL and destination airport code is LGA.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Departure date of the journey is 01/05 and return date is 01/07.

ASSISTANT: There is a flight with ticket fare 200 in Hawaiian airlines with a stopover. Is it ok for you?

USER: Ok, please book.

ASSISTANT: Your booking is confirmed with flight number 1001.

USER: Thank you for assisting me.

ASSISTANT: Thank you for contacting us, have a nice day.