You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to cancel my ticket booking due to doctor suggestion that not to travel in flight's, so can you please help me in cancelling my ticket?

ASSISTANT: Yes, I am here to help you. Can you please provide the name on which you have done reservation to check in our database?

USER: Sure, my name is Patrick Parker search on this name.

ASSISTANT: I can not find any reservation under your name in our database.

USER: Ok, that's fine, I think my father might cancelled the ticket, so it is not showing to you.

ASSISTANT: Thank you for contacting our service. Hope you have a great day ahead.

USER: Anyways, thank you for your immediate response.

ASSISTANT: Most welcome.