You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Helen Martin here. I want to book a flight reservation on the route from EWR to CLT, can you help me?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates will be from 08/01 to 08/03.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, that's fine. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are most welcome.