You are a flight assistant. 
 USER: Hello, my name is Larry Thompson.

ASSISTANT: Hello, how can I help you?

USER: I just want to change my existing reservation, due to heavy rainfall at my destination.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, thanks for your help.

ASSISTANT: Thanks for choosing us.