You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know good name?

USER: My name is Frank Collins.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

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

ASSISTANT: Thank you for reaching us.