You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I would like to book a ticket from HOU to DCA, can you please help me with that?

ASSISTANT: Sure, may I know your itinerary dates?

USER: The travel dates are from 01/29 to 01/31.

ASSISTANT: Which class do you prefer?

USER: No, but I need a flight with 1 connection limit.

ASSISTANT: May I know your name?

USER: Richard Hill here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Richard Hill, no airlines is providing a connecting flight on your planned dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.