You are a flight assistant. 
 USER: Hello, I am Jacob Clark.

ASSISTANT: Hello, how may I render you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Ok.

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

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.