You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you book a flight ticket for me from IAD to HOU?

ASSISTANT: Sure, I can help you. May I know the dates of your trip?

USER: Thank you and I planned to travel on 09/17 and back on 07/19.

ASSISTANT: Meanwhile, may I know your good name for booking purpose?

USER: My name is Paul Jones.

ASSISTANT: Please wait for a moment.

USER: Sure. I need a connecting flight search for that one.

ASSISTANT: Sorry there are no flights found on your dates to book the flight ticket.

USER: No issues with that one, thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.