You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to some health issue I am unable to attend the conference can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you. Please share your name.

USER: I am Samantha Jones.

ASSISTANT: Thank you for providing your name, sorry to say no reservation found with your name.

USER: No problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you so much for the information.