You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Christopher Smith, I just want to change my reservation to next week due to facing problem with construction on the way to airport. Can ypou help me?

ASSISTANT: Sure, please wait for a while.

USER: OK.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue that is. Leave it. Thanks for your response.

ASSISTANT: Thank you for availing us.