You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I aid you?

USER: I want to change my existing reservation as my dates of travel are changed.

ASSISTANT: Ok.

USER: Can you help me in changing my reservation?

ASSISTANT: Sure. May I know your name, please?

USER: I am Steven Martinez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, I did not find your name in the reservation records.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you for assisting me.