You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to change my reservation on the name of Richard Thomas, so please help me in this.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We did not find any reservation on your given name in our data.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing us.