You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please make a reservation from ORD to HOU to attend a event in Houston?

ASSISTANT: Please share your travel dates?

USER: My journey dates are, depart on Dec 10th and arrival on Dec 12th.

ASSISTANT: May I know your connection limit?

USER: I am looking for a flight with single connection.

ASSISTANT: Is there any other concern?

USER: My return time should be in the evening.

ASSISTANT: May I know your name please?

USER: My name is Ryan Thomas.

ASSISTANT: No flights found as per your preferences.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.