Hello. Myself Donald Green.
user
Hello, how may I best serve you today?
assistant
I need to change my existing reservation, can you please help me out?
user
Sure, we are perky to help you.
assistant
Thank you for your kind response.
user
Please provide me your source and destination airport codes.
assistant
My journey is round trip EWR.
user
May I know your preferable dates of journey?
assistant
My travelling dates are June,17 and June,19.
user
Please wait for a while.
assistant
Please take your time.
user
Sorry to say that, there are no flights available based on your details.
assistant
That's ok, thank you for searching the details.
user
Thank you for reaching us.
assistant