You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Perez here.

ASSISTANT: How may I aid you today?

USER: Can you please help me out in changing my recent reservation? As my health is not in a good position to do journeys.

ASSISTANT: Ok, I am happy to help you with that. Sorry for the inconvenience, there is no reservation found on your name in our database.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.