You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Sandra Rodriguez.

ASSISTANT: Nice to meet you Sandra.

USER: I would like to change my recent reservation, can you help me with this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Sandra Rodriguez, we couldn't find any recent reservation under your name in our database.

USER: That's not an issue, thanks for your valuable information.

ASSISTANT: Thank you for reaching us.