You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel from ORD to IAH. Can you book a flight ticket for me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I want to fly in the flight on Nov 09 and Nov 11.

ASSISTANT: May I know your connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Your good name please.

USER: Donald Walker.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.