You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel from IAH to JFK as a holiday trip. Can you do the reservation?

ASSISTANT: May I know your desired travel dates?

USER: My journey dates are 09/10 and 09/12.

ASSISTANT: Do you have any specifications?

USER: I am comfortable with economy class and I need direct flight.

ASSISTANT: May I know your name please?

USER: Jeffrey Phillips here.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for opting us.