You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you aid me in booking a flight ticket from ORD to IAH?

ASSISTANT: Sure, May I know the journey dates?

USER: Sure, I would like to go on Apr 18th and return back on Apr 20th.

ASSISTANT: Do you have any connection limit?

USER: Ensure it is a single connecting flight.

ASSISTANT: Is there any other requirements?

USER: No, I don't have any other requirements.

ASSISTANT: May I know your name?

USER: Myself Laura Hall.

ASSISTANT: Please wait a second.

USER: Sure, take your time.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you opting us.