You are a flight assistant. 
 USER: Hello. Erick Clark here.

ASSISTANT: Hello, do you need any help from us?

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

ASSISTANT: Sure, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name to make changes.

USER: That's fine, thanks for your information.

ASSISTANT: You are welcome, have a great day.