You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Andrew Miller here. Can you please book a connecting flight from DFW to ORD?

ASSISTANT: Sure, let me know your trip dates please?

USER: Sure, I want to depart on Nov 9 and need to return on Nov 11.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: Yes, I want to depart in the evening time and intend to return in the afternoon time.

ASSISTANT: May I know your connection limit?

USER: I already mentioned above.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No, I do not have any airline preference.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thanks for contacting us.