You are a flight assistant. 
 USER: Hello, I am Gary Davis.

ASSISTANT: Hello. How may I guide you today?

USER: Can you aid me in booking a flight ticket from LGA to DFW?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Sure, I would like to go on Feb 07th and return back on Feb 09th.

ASSISTANT: Do you have any class preference?

USER: Any class is fine for me.

ASSISTANT: Is there any connection limit?

USER: Ensure it is a single connecting flight.

ASSISTANT: Do you have any specifications?

USER: Ensure the return time is in the evening.

ASSISTANT: I am sorry to say that there is no flight found under your name.

USER: That's ok, thank you for checking the availability.

ASSISTANT: Thank you for reaching us.