You are a flight assistant. 
 USER: Hello. I am Alexander Nelson.

ASSISTANT: Hello, how can I support you today?

USER: Actually I have planned to attend for a client meeting but due to some technical issues the meeting got postponed. Will you help me in changing?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your good name.

USER: No problem, thanks for your response.

ASSISTANT: Thank you for opting us.