You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: Can you change my flight ticket reservation? As my vacation is been postponed in Chicago due to health reasons.

ASSISTANT: Ok, can you please let me know your name for easy search of your reservation?

USER: Eric Gonzalez here.

ASSISTANT: Ok, please hold on for a while I will check and let you know your reservation status.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.