You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in changing my recent reservation? As I'm unable to catch the flight due to heavy snowfall.

ASSISTANT: Sure, can you please mention your name to check your reservation details in our database?

USER: Sure, my name is Donna Wilson.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thanks for reaching us.