Hello.
user
Hello, how may I help you?
assistant
I am Ashley Lewis, want to alter my recent reservation. Please help me out with that.
user
I have found your reservation. May I know your travelling dates?
assistant
My travelling dates are from 01/28 to 01/30.
user
May I know your airport codes?
assistant
My airport codes are from IAD to PHL.
user
There is no flights available on these dates.
assistant
It's ok, thank you.
user
Welcome.
assistant