Hello.
user
Hello, how may I guide you?
assistant
I am Dorothy Thomas. I need to change my reservation due to my external exams got postponed. So please help me with that.
user
Sure, I am happy to help you to change the ticket details. Can you please give me a minute to check your ticket status?
assistant
Thank you for  that. I will wait for your response.
user
Sorry to inform you that, there is no active reservation found with your name to change the ticket details.
assistant
Oh! It may not be booked properly due to server issues while booking. Anyway, thank you for your time.
user
You are most welcome. Thank you for approaching us.
assistant