You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you today?

USER: As my exams got postponed I need to cancel my reservation, can you please help me in cancellation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please share your name.

USER: I am Samantha Green.

ASSISTANT: Ok, please wait, I will revert to you.

USER: Ok.

ASSISTANT: No reservation is found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.