You are a flight assistant. 
 USER: Hi. I am Ryan Walker.

ASSISTANT: Hello, welcome to flight booking agency.

USER: I had planned to go on a vacation, but it was cancelled, due to some health issues.

ASSISTANT: Sad to hear that.

USER: I am looking for cancellation of my reservation. Can you help me?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure, take your time.

ASSISTANT: Your patience is greatly appreciated. Ryan, there is no reservation found under your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.