You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Michelle Rodriguez. I am planning to change my reservation, can you help me?

ASSISTANT: Sure, wait a moment please.

USER: Sure.

ASSISTANT: Michelle Rodriguez, there is no reservation found under your name to change it.

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

ASSISTANT: Thank you for contacting us.

USER: You are welcome.