You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: This is Katherine Williams. I want to travel to LAS for a party, can you please help in booking a flight ticket from IAH?

ASSISTANT: Sure, May I know the travelling dates?

USER: My planned travel dates are July 30th and Aug 1st.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any preference in return time?

USER: I would like to return in the morning.

ASSISTANT: Is there any other requirements?

USER: I prefer to travel in normal cost airline.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

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

USER: That's ok, thanks for checking.

ASSISTANT: Thank you for opting us.