You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Gregory Walker. I would like to cancel my reservation as I am leaving for holiday trip, can you please help me out?

ASSISTANT: Please wait a while. Sorry to say, there is no flight on your desired travel dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for contacting us.