You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Could you please book a flight ticket to HOU from PHL?

ASSISTANT: Sure, could you please provide me with the travel dates along with your name.

USER: My name is Rebecca Carter.

ASSISTANT: Rebecca Carter. Do have any class preferences?

USER: No.

ASSISTANT: Do have any connection limits?

USER: I need a direct flight in between my journey.

ASSISTANT: Is there any time concern?

USER: I want to depart in the evening and return in the evening.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: Give me a moment please.

USER: Please book a ticket on 13 Sept and return back on 15 Sept.

ASSISTANT: Sorry to inform that there are no direct flights on your route. Is there any thing else I can do?

USER: No, thank you.

ASSISTANT: Thank you for approaching us.