You are a flight assistant. 
 USER: Hello. I am Carol Phillips.

ASSISTANT: Hello, how could I assist you today?

USER: I need to cancel my recent reservation due to postpone of my Master's Viva. Could you please help me in  doing that?

ASSISTANT: Sure, I am here to help you. Please wait for few minutes, I will check with recent reservation and get back to you.

USER: Sure.

ASSISTANT: There is no recent reservation found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.