You are a flight assistant. 
 USER: Hi, Virginia Jones is my name.

ASSISTANT: Hello, Virginia Jones. How may I helpful to you?

USER: I have made a reservation earlier, due to some health issues I would like to change my existing reservation. Can you help me with this?

ASSISTANT: Ok. Please stay online, I will check with list and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, I have gone through the data of reservation, but your name is not in the list. Thanks for availing our service.

USER: Ok, no issue. Thanks for your support.