Hello.
user
Hello. How can I aid you?
assistant
I need to change my existing reservation because of some health issue. Can you please help me in doing that?
user
Sure, may I know your name  to check your reservation status?
assistant
I am Eric Johnson.
user
Ok, please wait for a while.
assistant
Sure.
user
We have a found a reservation on your name. Please, share me your airport codes.
assistant
I will take off from PHL to land at ORD.
user
May I know your travel dates?
assistant
Ok, my updated journey dates are Jan 13 and Jan 15.
user
Do you have any connection limit?
assistant
I need a flight having single connection.
user
May I know your class preference?
assistant
I am comfortable with any class.
user
Do you have any more specifications?
assistant
Yes, my depart time should be evening.
user
Let me know your name to proceed.
assistant
I mentioned already.
user
Sorry, we have not found any flights running on your desired dates.
assistant
Ok, no problem. Thank you for the information.
user
Thank you for reaching us.
assistant