You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER:  I am Jeffrey Parker want to change my reservation due to heavy snowfall.

ASSISTANT: How can I help you out?

USER:  Can you help me in changing my reservation?

ASSISTANT: Sure, I can help you out. Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for approaching us.