You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Collins.

ASSISTANT: How can I guide you now?

USER: I am unable to attend a client meeting due to health issues, so I am unable to travel to my old office. Can you please help me in cancelling my  flight ticket?

ASSISTANT: Kenneth Collins, please wait for a while.

USER: Sure, I can wait for your response.

ASSISTANT: Sorry, no flights are available for your journey.

USER: Ok, that's fine. Thank you for your immediate help.

ASSISTANT: Thank you for consulting with us. Have a nice day.

USER: Welcome.