You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to travel from CLT to EWR, can you please help me to book my flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I have to depart on July 29th and return back on July 31st.

ASSISTANT: May I know your name to proceed further?

USER: My name is Paul Allen.

ASSISTANT: Sorry, there is no flight in your route as per your travel dates.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.