You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: My name is Frank Lee. I would like to book a ticket from LAX to HOU.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My itinerary travel dates are Oct 14 and Oct 16.

ASSISTANT: Ok, do you have any requirements?

USER: Yes, I would like to board a single connection flight where the depart time should be in the evening.

ASSISTANT: Sorry Frank Lee, there are no flights available on your requested dates.

USER: No problem, thank you for your help?

ASSISTANT: Welcome, thank you for choosing us. Have a great day.