You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please book a flight ticket from LGA to IAH?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are from Feb 27 to Feb 29.

ASSISTANT: Do you have any connection limit?

USER: I need single connecting flight.

ASSISTANT: May I know your airline preference?

USER: I prefer normal cost airline.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Melissa Brown.

ASSISTANT: Sorry, there are no flights in this route as per your travel dates.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.