You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephen Moore here.

ASSISTANT: How may I assist you at this moment?

USER: Can you please help me in booking the ticket from Houston to New York?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling?

USER: Sure, I'm planning to depart from here on 01/06 and return by 01/08.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: Sure, my source airport code is HOU and destination airport code is EWR.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us, have a great day.