You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Matthew Anderson. I want to change my existing reservation. Can you be my helping hand in this?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for opting us.