You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I want to cancel my ticket, because my journey of travelling to Washington has been postponed.

ASSISTANT: Sure, I will help you with that. Please wait a moment. May I know your name for checking?

USER: My name is Brandon Wright.

ASSISTANT: Sorry Brandon, no reservation has found under your name.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.

ASSISTANT: You are welcome.