You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you now?

USER: I am Nicole Martinez.

ASSISTANT: Ok.

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

ASSISTANT: Sure, we are happy to help you. Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time, we did not find any reservation on your name.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.