You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am looking for a flight from IAH to DFW, can you please help me in booking?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are Aug 16 and Aug 18.

ASSISTANT: Do you have any connection limit?

USER: My connection limit is 1.

ASSISTANT: May I know your airline preference?

USER: I prefer normal cost airline.

ASSISTANT: Do you have any specification?

USER: No.

ASSISTANT: Sorry, currently no flights are available on your preferable travel dates.

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

ASSISTANT: May I know your name?

USER: Sure, my name is Patrick King.

ASSISTANT: Thank you for choosing us, have a great day.