You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for the day?

USER: I need to book a flight ticket from HOU to IAD, can you help me in booking a flight ticket?

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

USER: Sure, my scheduled dates are Apr 17 and Apr 19.

ASSISTANT: Do you prefer connecting or direct flight in your journey?

USER: I prefer maximum one connection.

ASSISTANT: May I know your name please?

USER: Sure, Frank Wilson here.

ASSISTANT: Do you have any other requirements?

USER: No, you can proceed.

ASSISTANT: Sorry, there are no flights are available matching your credentials.

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

ASSISTANT: Thank you for choosing us.