You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I amend you?

USER: I am Benjamin Robinson. As I planned to go long trips unfortunately it got postponed, can you help me in changing my resent reservation.

ASSISTANT: Sure. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately, There is no reservation found against your name.

USER: No issues, thank you for your fast response.

ASSISTANT: Thanks for choosing us.