Hello.
user
Hello, how may I help you?
assistant
I am Rachel Walker. Due to my health problem I want to change my reservation dates, can you please help me to change me reservation dates?
user
Sure, I will help you with the change of flight reservation.
assistant
Thank you.
user
Thanks for waiting patiently. But I regret to inform you that that there is no flight reservation on your name to change it.
assistant
Ok, no problem. Thank you so much for your response.
user
Thank you.
assistant