You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Edward Walker. Could you please help me with booking a flight ticket from HOU on 04/09?

ASSISTANT: Sure, may I know your preferred destination?

USER: My destination airport code is DFW.

ASSISTANT: Do you want a return ticket?

USER: Yes, I need a return ticket.

ASSISTANT: May I know your return date?

USER: My return date is 04/11.

ASSISTANT: Thank you for your details. Sorry, there is no flight is available for you.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for the information.