You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Can you please book me a flight ticket from EWR to ATL?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from Apr 2nd to Apr 4th.

ASSISTANT: Do you have any connection limit?

USER: I want a direct flight to travel.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am David Turner.

ASSISTANT: Sorry, there are no flights found with your data.

USER: No problem, thank you.

ASSISTANT: Thank you.