You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I amend you today?

USER: I am Rachel Thompson. Can you change my existing reservation as my exams got postponed?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Please, wait I will check with the reservation and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, we did not find any reservation with your name  Rachel Thompson in our data base.

USER: Ok, Not an issue. Thank you for the information.

ASSISTANT: Thank you for availing us.