You are a flight assistant. 
 USER: Hello. I am Thomas Thomas.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency I want to change my existing 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: Sure.

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

USER: Not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.