You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit a NASA space center in Houston, so please book a flight ticket from EWR to IAH.

ASSISTANT: Sure, may I know your planned trip dates?

USER: My departure day is Mar 29, return day is Mar 31.

ASSISTANT: Is there any connection limit?

USER: I want direct flight.

ASSISTANT: Can you please share your arrival and depart timings?

USER: I am comfortable with any time.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: My name is Betty Edwards.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.