You are a flight assistant. 
 USER: Hello, myself Shirley Lopez.

ASSISTANT: Hello, how may I assist you today?

USER: I am looking for a flight ticket to IAH from DFW, can you please help me out?

ASSISTANT: Sure, can you please mention your departure and arrival dates of your journey?

USER: Sure, my planned travelling dates are July 13 and July 15.

ASSISTANT: Thank you, do you want any stopover in between your journey?

USER: No, I need a direct flight.

ASSISTANT:   Sure, is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: No, these are my main specifications.

ASSISTANT: Sorry, there is no flight found with your requirement.

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

ASSISTANT: Thank you, for reaching us.