You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to travel from EWR to HOU. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: I want to fly in the flight on Sept 15 and Sept 17.

ASSISTANT: May I know your name please?

USER: Richard Collins.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a direct flight.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.