You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Charles Garcia.

ASSISTANT: Nice to meet you, Charles.

USER: I recently booked a ticket to enjoy in beach which is in Goa but, suddenly, my grand mother is effected with typhoid. So, I would like to cancel my trip, can you help me?

ASSISTANT: That's really sad to here, I will help you with that. Sorry Charles, there is no reservation found on your name. Thank you for choosing us, have a nice day.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: You are welcome.