You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I am planning to go near to my grand parents, can you please help me to book my ticket from DFW to HOU?

ASSISTANT: Sure, I will help you. May I know your good name please?

USER: Kimberly Carter here.

ASSISTANT: Ok Carter, can you please tell the departure and arrival date?

USER: My travelling dates are 09/17 and 09/19.

ASSISTANT: Ok, please wait a moment. Sorry to inform you Carter, there are no flights available with the details you have given.

USER: Ok, fine. Thank you for your information.

ASSISTANT: Thank you for reaching us.