You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I be of your service?

USER: I am Ashley White, I am going to Washington for vacation due to heavy snow I want to change my reservation with new dates. Can you help me to change my reservation?

ASSISTANT: Sure, please wait for a minute I will check with your status and revert you.

USER: Sure.

ASSISTANT: Sorry to inform that there is no reservation found with your name.

USER: Thank you for the information.

ASSISTANT: Thank you for opting us.