You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, can you please tell me your name?

USER: Yes, myself James Roberts.

ASSISTANT: Ok, James what can I do for you?

USER: Due to heavy rains in our area I am unable to have a move from here.So, I would like to change my reservation which I have done last week.

ASSISTANT: Ok, Roberts I check and let you know about your reservation.

USER: Sure, have your time.

ASSISTANT: Sorry Roberts, no reservation found on your name.

USER: Oh! it might not have confirmed by your agent on that day when I have reserved.

ASSISTANT: Thank you for connecting with us.

USER: Most welcome.