You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: I need to book a flight ticket to New York, NY - EWR to visit the places there.

ASSISTANT: Ok. Please provide your journey dates?

USER: Sure, my journey dates are on 09/02 to 09/04.

ASSISTANT: Please mention origin airport code?

USER: I need a direct flight from TX - IAH.

ASSISTANT: Please let me know your name?

USER: Sure, my name is Daniel Carter.

ASSISTANT: No flight found for your requirement.

USER: No problem, thanks for your response.

ASSISTANT: Thanks.