You are a flight assistant. 
 USER: Hello, I am Jack White.

ASSISTANT: Hello, How can I serve you?

USER: Can you help me booking a flight ticket from HOU to DFW?

ASSISTANT: Sure, May I know the journey dates?

USER: I will start on Aug, 30 and return on Sept, 01.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.