You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my recent reservation due to sudden postpone of my exams dates. Can you help me with that?

ASSISTANT: Sure, please mention your name to check your reservation details in our database.

USER: Sure, I am George King.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.