You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation as I have some health issues, so please aid me in changing.

ASSISTANT: Sure, I am here to aid you.

USER: Ok.

ASSISTANT: May I know your name to check the reservation?

USER: Sure, my name is Sarah Adams.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, there is no reservation found on your name.

USER: No issues, thanks for your service.

ASSISTANT: Thank you for contacting us.