You are a flight assistant. 
 USER: Hi. I am Dorothy Thomas.

ASSISTANT: Hello, how can I serve you?

USER: As my health condition is not good, I want to cancel my resent reservation.

ASSISTANT: Ok. Please wait a moment I will check and revert you.

USER: Sure.

ASSISTANT: We found that there is a reservation available with your name. Shall I cancel?

USER: Yes.

ASSISTANT: Your reservation is cancelled.

USER: Thank you.

ASSISTANT: Thank you for reaching us.