You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Samuel Mitchell, want to travel from EWR TO LGA. Will you please help me in booking my ticket?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are from 07/21 to 07/23.

ASSISTANT: Sorry Mitchell, I couldn't found any reservation on your name.

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

ASSISTANT: You are welcome.