You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Actually, I want to cancel my reservation which is done recently due to some health issues, can you please help me in this?

ASSISTANT: Sure, I am here to help you. Please help me with your name.

USER: Sure, my name is Jessica Mitchell.

ASSISTANT: I found your reservation in our database and cancelled it successfully.

USER: Thank you for your service.

ASSISTANT: You are welcome and thank you for choosing us.