You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Patricia Wilson. Can you help me to change the reservation which I had done last week?

ASSISTANT: Sure, please wait a minute.

USER: Ok, thank you for understanding my concern.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: That is ok, thank you for the information.

ASSISTANT: Thank you for reaching us.