You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment/.

USER: I want to cancel my reservation due to postpone of my business trip. Can you help me with that?

ASSISTANT: Sure, please provide your name for checking your recent reservation status?

USER: I am Benjamin Hernandez.

ASSISTANT: Ok, please stand by.

USER: Sure, I will wait.

ASSISTANT: There is no recent reservation found on your good name in our data base.

USER: No problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your service.