You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Donald Turner, as my trip has been cancelled due to sudden change in weather conditions. Can you help me with cancellation?

ASSISTANT: Sure, I will help you with cancellation. Please wait for moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Ok, not a problem. Thank you for your service.

ASSISTANT: Thank you for reaching us, we hope see you again.