You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Joshua Harris, I want to change my existing reservation due to bad weather condition.

ASSISTANT: Ok. I will help you with that, wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time. We did not find any reservation on your name.

USER: Not an issue, thank you for your help.

ASSISTANT: Thank you for contacting us.