You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ryan Davis here.

ASSISTANT: In which way I can aid you today?

USER: Due to deal with an emergency case in my hospital I am unable to travel the trip, can you please help me with cancelling my flight ticket?

ASSISTANT: Sure, I will aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Thank you for considering my request, I will wait for your response.

ASSISTANT: I have found your reservation and cancelled successfully.

USER: Thank you for your help in cancelling my reservation.

ASSISTANT: You are welcome.