You are a flight assistant. 
 USER: Hello. I am Rebecca Clark.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to visit New York JFK to meet my grand father from  Houston HOU. Can you find a flight ticket for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Ok, my planned trip dates are on Sept 13 and return on Sept 15.

ASSISTANT: Do you have any airline preferences?

USER: No,but I want to depart in the afternoon time and return in the morning time.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, I need a single connecting flight to travel.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.