You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Patricia Martinez. I had planned to go on a trip, but it was postponed due to some reasons. Can you change my recent reservation?

ASSISTANT: Sure, please wait while I pull out your current reservation.

USER: Ok, take your time.

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

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.