You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I would like to change my brother's reservation because he is not feeling well, can you please help me out?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Can you please provide the name on which you have previously reserved the ticket?

USER: Sure, his name is Richard Turner.

ASSISTANT: Richard Turner, there is no active reservation found under this name change it.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for contacting us.