You are a flight assistant. 
 USER: Hello, I am Barbara Carter.

ASSISTANT: Hello, how may I serve you?

USER: As my with my client was postponed, Can you please change my reservation.

ASSISTANT: Ok, please wait a moment I will check and let you know the details.

USER: Sure.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us.