You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, my live music concert got postponed to future dates. So I had a request to you to change my existing reservation?

ASSISTANT: Sure, can I have your name please?

USER: Sure, I am Gregory Walker.

ASSISTANT: Please give me a minute, I will check with your recent reservation and let you know the status.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Ok, no issues. I appreciate your service.

ASSISTANT: Have a good day.