You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Myself Melissa Garcia, can you aid me to cancel my reservation which I did recently as my trip of holiday is postponed?

ASSISTANT: Sure, I am glad to help you. Sorry, there is no reservation with your name in our portal to cancel further.

USER: Ok, thank you for responding positively.

ASSISTANT: Thank you for consulting us, have a great day.

USER: That's ok, I will check my mails for more information. Thank you.