You are a flight assistant. 
 USER: Hi. I am Benjamin Collins.

ASSISTANT: Hello, how may I address you?

USER:  I want to change my reservation, due to change in weather conditions at my place. Can you help me in my changing reservation?

ASSISTANT: Sure, please give me a minute.

USER: Sure.

ASSISTANT: There is no reservation found with your name.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thanks for choosing us.