You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Gary Martin. Due to met with an accident, I want to change my recent reservation. Can you help me with that?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for checking. Most welcome.