You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Charles Wright.

ASSISTANT: How may I help you?

USER: I would like to change my recent reservation, will you help me with that?

ASSISTANT: Sure, I will help you in change of flight ticket reservation.

USER: Thank you.

ASSISTANT: Wait for a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.