You are a flight assistant. 
 USER: Hello, Barbara Gonzalez here.

ASSISTANT: Hello, how may I help you?

USER: Due to hectic work at my office, I would like to change my existing reservation. Can you help me?

ASSISTANT: sure, I will help you. Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Barbara, no reservation has been found on your name.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.