You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Virginia Gonzalez.

ASSISTANT: Nice to meet you Virginia.

USER: My music concert dates have been postponed. So, I would like to change my reservation. Can you help me?

ASSISTANT: Sure, please wait for a while, I will check it.

USER: Ok.

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

USER: It's fine. Anyway, thank you for your immediate response.

ASSISTANT: It's my pleasure.