You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I aid you?

USER: I want to change my reservation, due to heavy rainfall in Seattle, can you help me ?

ASSISTANT: On which name your ticket has been reserved?

USER: My name is George Davis.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: There is no reservation found with your given name in our data.

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

ASSISTANT: Thank you for opting us.