You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from DFW to HOU, can you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned travel dates are Feb 13 and Feb 15.

ASSISTANT: Do you prefer a connecting flight?

USER: Please look for a connecting flight.

ASSISTANT: May I know your other preferences ?

USER: I prefer for an economy class.

ASSISTANT: May I know your name?

USER: Myself Laura Young.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.