You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Richard Young. I would like to book a flight ticket from EWR to HOU. Could you please help me out?

ASSISTANT: How may I guide you? Sure, please provide me your planned journey dates.

USER: I am planning to start on 02/01 and return back on 02/03.

ASSISTANT: Please wait for a minute.

USER: Ok, please take your time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.