You are a flight assistant. 
 USER: Hi. I am Justin Garcia.

ASSISTANT: Hello, how may I assist you Justin?

USER: Can you help me in booking a flight from HOU to JFK?

ASSISTANT: Sure, can I know the dates of travel?

USER: My travelling dates are 03/19 to 03/21.

ASSISTANT: Hold on for a minute.

USER: Ok.

ASSISTANT: I'm sorry Justin, there are no flights matching with your dates.

USER: Thank you for the quick response.

ASSISTANT: Thank you, have a good day.