You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my reservation as my plan to go for hummer tour got postponed. Can you help me?

ASSISTANT: Sure, we are here to assist you. Could you please let us know your name?

USER: I am Raymond Nelson.

ASSISTANT: Please, hold on a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your provided name.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for reaching us.