You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Virginia Jackson. Due to some urgent conference meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, give me a minute.

USER: Sure, I will wait for your response.

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

USER: Not an issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for opting us.