You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book me a plane ticket in flight that departs in the morning?

ASSISTANT: Sure, may I know your airport codes?

USER: My origin is DCA and destination is IAH.

ASSISTANT: Can you please share your trip dates?

USER: I will start on Nov 4th and return on Nov 6th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 stop over.

ASSISTANT: Is there any class preference?

USER: No, I am okay with any class.

ASSISTANT: May I know your good name to proceed further?

USER: I am Nicole Robinson.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: That's Ok, thanks for checking.

ASSISTANT: Thank you for availing us.