You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am Amy Clark. I need to change my recent reservation due to postpone of exams dates. Could you please help me?

ASSISTANT: Sure, we are here to assist you. Please wait for a while. I will check the reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting. There was no reservation found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.