You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How best can I guide you today?

USER: Please book me a flight ticket from HOU to JFK to meet my family.

ASSISTANT: Sure, may I know your journey dates?

USER: I have planned to travel on Oct 10th and return on Oct 12th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer connecting flight.

ASSISTANT: May I know about your other specifications?

USER: I want to depart at evening time and return at afternoon time.

ASSISTANT: Let me know your name to proceed further.

USER: Emma Johnson.

ASSISTANT: We regret to inform you that, there are no flights running on your desired routes.

USER: Ok, no problem. Anyway's thank you.

ASSISTANT: Thank you for choosing us, have a good day.