You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Anderson here.

ASSISTANT: How may I help you?

USER: Due to strange climatic conditions, I want to postpone my trip to some other dates. Can you please help me out?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.