You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Timothy Martin, due to health issues I am unable to travel at this moment, so can you help me for cancelling my recent reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: There is no reservation on your name in our database.

USER: Oh! I think my sister already cancelled my reservation.

ASSISTANT: Do you want to know anything else?

USER: No, anyway thank you for your response.

ASSISTANT: Thank you for opting us. Have a nice day.