You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Virginia Martin here.

ASSISTANT: Ok. How can I aid you today?

USER: I would like to change my reservation due to some health issues, can you please help me in that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation found on your name in our reservation list.

USER: That's ok, no problem.

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

USER: Thank you for checking out.