You are a flight assistant. 
 USER: Hello. I am Jonathan Evans.

ASSISTANT: Hello, how can I guide you for today?

USER: I planned to attend for a meeting in ORD, can you please help me to book a flight ticket from HOU?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I prefer to travel on Dec 27 and Dec 29.

ASSISTANT: Do you have any class preferences?

USER: I am comfortable with all classes.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I prefer to travel in normal cost.

ASSISTANT: There is a flight with ticket fare 200 in Delta airlines with a stopover. Is it ok for you?

USER: I would like to depart in evening.

ASSISTANT: Sorry, there are no flights available with your requirements.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.