You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please wait a moment.

USER: Sure.

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

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

ASSISTANT: Thank you for contacting us, hope to serve you next time.