You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Eric Lopez. I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, please give me a moment.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: Oh! It may not be booked properly due to some technical issues.

ASSISTANT: Thank you for contacting us.

USER: Anyway, thank you for your time.