Hello. Mark Thompson here.
user
Hello, how can assist you?
assistant
Due to sudden health issue, I am not able to travel in a flight on those date that I want to travel. So, I would like to change my reservation. Can you please help me out with that?
user
Sure, I here to help you.
assistant
Thank you.
user
Sorry, to inform you there is no reservation found under your name.
assistant
Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.
user
Thank you for choosing us.
assistant
Welcome.
user