You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking a flight ticket from New York, EWR to Dallas, DFW?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Tell me your travel dates and connection limit please?

USER: My journey dates are from Aug 18 to Aug 20. I need a flag stop in between journey.

ASSISTANT: May I know your name please?

USER: My name is Samuel Jackson.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Thanks for your time. I have not found any flight matching your flight details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you.