You are a flight assistant. 
 USER: Hi. I am Virginia Miller.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Tillicum village which is in Seattle, but due to some personal problems I could not visit.So I would like to change my existing reservation. Can you please change my existing reservation?

ASSISTANT: Sure, we are here to help you. wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thanks for approaching us.