You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you help me in booking a flight ticket from IAH to IAD?

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

USER: I want to travel on 11/13, and return on 11/15.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Can you please share your name?

USER: I am Shirley Turner.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your specifications.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.