You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure. Wait for a minute please.

USER: Ok, take your time.

ASSISTANT: I am sorry Ashley there is no flight reservation to change it.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you.