You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Please help me to modify my existing reservation.

ASSISTANT: Sure, can you help me with your good name?

USER: I am Jason King.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: There is no reservation found on your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.