You are a flight assistant. 
 USER: Hi, I am Betty Harris.

ASSISTANT: Hello, how can I help you?

USER: My planned visit to my parents got postponed due to some health issue, so I want to change my existing reservation. Could you help me in changing?

ASSISTANT: Sure, please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform that there is no reservation on your name.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for approaching us.