You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you now?

USER: I am planning to visit Houston, can you please book me a ticket from ORD to HOU?

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

USER: I am planning my journey on the dates of Dec 08 and Dec 10.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: May I know about your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other preferences?

USER: I prefer to depart in morning time flight and would like to return on afternoon time.

ASSISTANT: Let me know your name to proceed further.

USER: My name is Joseph Campbell.

ASSISTANT: Sorry, no flights are running on your routes.

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

ASSISTANT: Thank you for opting us.