You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Michael Evans. My music concert dates have been postponed, can you help me in changing my reservation?

ASSISTANT: Sure, I will help you. Please wait a while.

USER: Sure.

ASSISTANT: There is no reservation on your name in our database.

USER: It's fine. Thank you for your immediate response.

ASSISTANT: Thank you for contacting us.