You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am Shirley Mitchell. Can you please assist me in booking a flight ticket from NY-LGA to TX-IAH?

ASSISTANT: Sure, we are here to help you with that. Can you please share your planned travel dates?

USER: My journey dates are from Feb 21 to Feb 23.

ASSISTANT: May I know your airline preference?

USER: I am ok with any airline.

ASSISTANT: Do you have any connection limit?

USER: I need a way station in between journey.

ASSISTANT: Which class do you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specific departure and arrival time?

USER: My departure time is afternoon.

ASSISTANT: There is no flight available on this route as per your details.

USER: That's ok, not a problem.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thanks for your information.