You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Steven Williams here. Due to my ill health, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, take your time.

ASSISTANT: Sorry Steven Williams, no reservation is available by your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for approaching us.