You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to some personal work, I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Ok, may I know your name?

USER: Sure, you can check the reservation on the name of Jason Baker.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation was found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT:  thank you for opting us.