You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Please help me in booking flight ticket from HOU to ORD to attend meeting.

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Karen Jones.

ASSISTANT: Please help me with your planned travelling dates.

USER: My trip dates are Apr 07 to Apr 09.

ASSISTANT: Do you wish to have a break in between your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: My depart should be in the evening.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Karen Jones, I am really sorry to inform you that there are no flights available for your journey.

USER: Ok, no problem.

ASSISTANT: Thank you for understanding.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a great time.