You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my reservation, due to some health problems I am unable to travel those dates, so can you please cancel my reservation?

ASSISTANT: Sure, I will help you to cancel that reservation.

USER: Thanks.

ASSISTANT: But I need your name to check that reservation.

USER: Sure, my name is Alexander Anderson.

ASSISTANT: I cannot find any reservation with your name in our database.

USER: It's ok no problem. Thank you for your information.

ASSISTANT: It's my pleasure, have a great day.