You are a flight assistant. 
 USER: Hi, myself Amy Roberts.

ASSISTANT: Hello Amy, how may I know your today? How may I help you?

USER: I have planned a trip previously, due to some tornadoes happening there, I want to cancel the reservation which In have done previously.

ASSISTANT: Sure, please wait for a minute. Sorry, I cannot find any reservation with your name.

USER: Oh! that's fine, thank you for your quick response.

ASSISTANT: Thanks for contacting us. It's my pleasure.