You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Christine Rodriguez. I want to change an existing reservation due to sudden change in my trip. Can you help me?

ASSISTANT: Sure, wait a minute.

USER: Thank you. Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.