You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself James Hill.

ASSISTANT: Hill, how can I assist you?

USER: My holiday trip has been postponed, so I would like to change my existing reservation. Can you help me?

ASSISTANT: Sure. Sorry, there is no reservation on your name.

USER: Thank you. No issue.

ASSISTANT: Thank you for reaching us.