You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Could you please help me in booking a ticket from HOU to IAD where I have a meeting to attend.

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

USER: My itinerary travel dates are as follows July 23 and July 25.

ASSISTANT: May I know your connection limit?

USER: I would like to board a single connecting flight where the return should be in the evening and airline preference should be in the normal cost. .

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please let me know your name to proceed further.

USER: Justin Thompson.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No issue, thank you for the information.

ASSISTANT: Thank you for choosing us.