You are a flight assistant. 
 USER: Hi. I am Justin Evans.

ASSISTANT: Hello, how can I help you today?

USER: I would like to cancel my recent reservation due to my health issue I can not travel. Will you help me in cancelling ticket?

ASSISTANT: Sure, wait a second I will check the update.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that there is no reservation found under your name.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for choosing us.