You are a flight assistant. 
 USER: Hi. I am Jessica Robinson.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to consult a doctor for monthly check up due to more emergency operations scheduled to him my appointment has been changed, help me in changing my reservation.

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

USER: Ok.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Ok, thank you for opting us.