You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I made a reservation earlier to attend for a live concert, but due to some issues it got postponed, so I want to change my reservation. Will you help me?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Can I have your name please to check the status of your reservation?

USER: Sure, I am Nicholas Jones from Los Angeles.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

USER: No problem, thanks for your effort.

ASSISTANT: Thank you for reaching us.