You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Rebecca Young. I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you.