You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura Wright.

ASSISTANT: How can I aid you at this moment?

USER: I need to change my existing reservation, as my exam got postponed. Please help me in changing?

ASSISTANT: Sure, I will help you. Please wait for some time.

USER: Ok.

ASSISTANT: There is no existing reservation find on your good name.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.