You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please help me with cancelling my ticket? My doctor suggested me to avoid travelling because of my back pain.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Myself Jason Thomas.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Oh! That's fine. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.