You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I be your helping hand?

USER: I want to change my reservation as I am unable to travel due to some health issues, so help me in changing.

ASSISTANT: Sure, we are here to aid you. May I know your name please?

USER: Sure, I am Ruth Mitchell.

ASSISTANT: Please hold on for a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation found in your name.

USER: No problem, thanks for your support.

ASSISTANT: Thanks for choosing us.