You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my reservation due to urgent meeting, can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: I am Barbara Rodriguez.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for being patient, There was no reservation found on your name to change it.

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for reaching us.