You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to change my ticket reservation done on previous month, can you help in that?

ASSISTANT: Sure, I am here to help you. Can you please tell me your good name to check the ticket status?

USER: Sure, my name is Linda Anderson.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

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

USER: Ok, that's not a problem for me, I think it is not confirmed properly. Thank for your search.

ASSISTANT: Ok, thank you for reaching us.