Hello, I am William Martin.
user
Hello, how may I assist you?
assistant
Due to medical emergency, can you change my existing reservation for me?
user
Sure, hold on for a moment. Let me check. Sorry Martin, there are no flights available on your given dates.
assistant
No issues. Thank you for checking.
user
Welcome, thank you for choosing us. Have a great day.
assistant
You are welcome.
user