You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please book a flight from ORD to HOU?

ASSISTANT: Sure, when are you planning to start and return on?

USER: Thank you. I have planned my travel dates as Oct 06 and Oct 08.

ASSISTANT: Do you have any other specifications?

USER: Yes, I would prefer economy class to travel.

ASSISTANT: Do you prefer a connecting flight?

USER: Yes, I am looking for single connecting flight so please check with that.

ASSISTANT: Can I know your good name?

USER: Sure, myself George Green.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you.

USER: Most welcome.