You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to change my existing reservation, because my exams got postponed. Can you help me in this?

ASSISTANT: Sure, may I know your name?

USER: I am Ashley Robinson.

ASSISTANT: Ok, please wait I will check the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you.