You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Adams.

ASSISTANT: Ruth Adams, how can I assist you?

USER: Can you please change my reservation?

ASSISTANT: Sure, please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation is available by your name.

USER: Thank you for informing me.

ASSISTANT: Thank you for choosing us.