You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I am Pamela Lopez. I want to change my existing reservation as my exam got postponed. Please help me.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: No issues, thanks for the response.

ASSISTANT: Thank you.