You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Robert Rodriguez here. I am looking for a flight ticket in a normal-cost airline. So can you book it for me?

ASSISTANT: May I know your desired travel dates please?

USER: The travel dates are from 27 June to 29 June.

ASSISTANT: Can I know your preferred airport codes?

USER: The airport codes are from LGA to IAH.

ASSISTANT: Do you have any specifications?

USER: The return time should be morning.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: It should be a business class. Is there no flight with one connection? As I need it urgently.

ASSISTANT: There is no flight with connection limit 1.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.