You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: My name is Brenda Miller, planning to book a flight ticket from IAD on 07/07. My return journey details are from IAH on 07/09. Is there any flight available according to my details?

ASSISTANT: Thank you so much for provided the complete journey details with your name. Please wait let you know the status.

USER: Ok.

ASSISTANT: Very sorry to inform you, No flights found as you requested.

USER: Ok. No problem. Thank you.

ASSISTANT: Thank you, Have a great day.