You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want to change my reservation due to some health issues, so please help me.

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Sure, I am Elizabeth Thompson.

ASSISTANT: Sorry, I did not found any reservation on the name.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.