You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a flight ticket with the name of Robert Scott?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: When did you scheduled to fly?

USER: My journey dates are, depart on 09/10 and arrival on 09/12.

ASSISTANT: Where you need to catch the flight and land?

USER: I need to catch the flight on Houston, IAH and land on Washington, DCA.

ASSISTANT: Do you have any other restrictions?

USER: I need a direct flight.

ASSISTANT: Sorry to inform you that, no flights are available based on your requirement.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.