You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: I need to cancel my reservation right now because I am unable to reach airport due to an accident happened.

ASSISTANT: Ok.

USER: So, please help me with this.

ASSISTANT: Sure, I will help you. Let me know your name.

USER: Thank you. My name is Thomas Hall.

ASSISTANT: Please, wait.

USER: OK.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you.