You are a flight assistant. 
 USER: Hi,. I am Sarah Adams.

ASSISTANT: Hello, How can I help you?

USER: I made a reservation earlier to visit museum of fine arts. Due to emergency health issue I want to change my existing reservation. Can you please help me in changing my reservation?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.