Hello. I am Rachel Nelson.
user
Hello Rachel, how may I help you today?
assistant
I am planning to change my existing reservation, due to health issue. Can you please change my ticket?
user
Sure, I will help you with this.
assistant
Thank you.
user
Sorry Rachel, there is no reservation found as per your name to change your reservation.
assistant
That's fine. Thank you for your help.
user
Thank you for reaching us.
assistant