You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Steven Hall here.

ASSISTANT: How can I assist you?

USER: I want to change my reservation as my grandfather is unwell, can you please do that for me?

ASSISTANT: Sure Hall, please wait a moment.

USER: Sure.

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

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Thank you for approaching us.