Hello.
user
Hello. How can I help you?
assistant
 I have to change my flight ticket details that I unable to travel to meet my sister at that time, can you help me in that one?
user
On which name can I proceed for changing?
assistant
Can you please search a flight ticket with name Brenda Hall.
user
I am sorry no flights found in your route.
assistant
Ok, fine thank you for checking.
user
Thank you.
assistant