You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I need to book a flight ticket to HOU from JFK, can you please help me in booking?

ASSISTANT: Sure, May I know the journey dates?

USER: My journey dates are from May 14 to May 16.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Samuel Martin.

ASSISTANT: Do you have any airline preference?

USER: I am comfortable to travel in normal cost airline.

ASSISTANT: Is there any other requirements?

USER: I would like to return in the evening.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.