You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jessica Phillips here.

ASSISTANT: How can I aid you today?

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

ASSISTANT: Sure, I can help you in changing your reservation.

USER: Thank you.

ASSISTANT: Sorry, I couldn't  found any reservation by your name  in our database.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for connecting us.