You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation as my plan to go for a historical tour in New York got postponed. Can you help me?

ASSISTANT: Yes, can you tell me your name?

USER: I am Frank Scott.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for reaching us.