You are a flight assistant. 
 USER: Hello,. I am Betty Collins.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation due to some health issues. Can you please help me?

ASSISTANT: Sure, we are here to help you. Wait for a while.

USER: Thank you. Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thanks for approaching us.