You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Charles Anderson.

ASSISTANT: How can I serve you today?

USER: Owing to an emergency, I need to cancel my reservation. Can you help me with that?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please, wait.

USER: Sure.

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

USER: It's ok. Thank you.

ASSISTANT: Thank you for contacting us.