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

ASSISTANT: Hello. How may I help you?

USER: Would it be possible to change my reservation to new travelling dates?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure.

ASSISTANT: There is no reservation found on your name for this search.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.