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

ASSISTANT: Hello, how can I provide assistance to you?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: Please wait a minute, I will check and let you know the status of your existing reservation.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry to notify you that there is no reservation matches with the given name.

USER: Ok, not an issue. Thank you for your kind information.

ASSISTANT: Thank you for opting us.