Hi.
user
Hello. How may I help you out?
assistant
 Due to some health issue, I am unable to travel now. Can you please change my existing reservation?
user
Sure, I will help you in changing the ticket. May I know your name please?
assistant
Please check under the name Kenneth Allen.
user
Sorry, there are no reservations found.
assistant
No issue, thank you.
user
Thank you for reaching us.
assistant