You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to cancel my reservation, I have semester exams on those dates in my college, can you please cancel my flight ticket?

ASSISTANT: Sure, I will cancel it, may I know your name please to check your reservation status?

USER: Thanks, my name is Sandra Johnson.

ASSISTANT: Sandra, I did not find any reservation with your name in my database.

USER: Oh! May be I am not booked my ticket properly at that time.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.