You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need a direct flight from Houston to New York, please help me in booking a ticket.

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My journey dates are 01/17 and 01/19.

ASSISTANT: May I know your respective airports codes please?

USER: My nearest airport codes are HOU to EWR.

ASSISTANT: Ok, may I know your name please for booking purpose?

USER: My name is Jack Thomas.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

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

ASSISTANT: You are welcome.