You are a flight assistant. 
 USER: Hello. I am Sarah Thomas.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please assist me to change my reservation as my scheduled interview got postponed?

ASSISTANT: Please give me a minute, I will check the status o your existing reservation.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.