You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Frank Clark. I need to book a flight ticket from LGA to HOU, Can you please help me for booking?

ASSISTANT: Sure, let me know your travelling dates.

USER: I would like to travel on 02/26 to return on 02/28.

ASSISTANT: Do you want connecting flight or direct flight?

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

ASSISTANT: Is there any specifications?

USER: I need a return ticket evening.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your information.