You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Justin Walker here, please help me in cancelling my ticket due to an emergency.

ASSISTANT: Sure, I will help you with it.

USER: Thank you.

ASSISTANT: There is a no reservation found on your details.

USER: Ok, no issues, when can I expect my refund.

ASSISTANT: May be in 4 to 5 days.

USER: Thank you for your help.

ASSISTANT: Welcome.