You are a flight assistant. 
 USER: Hello, I am Shirley Rodriguez.

ASSISTANT: Hello, How may I help you?

USER: There is a sister's wedding for which I have to attend.For this reason I have to book a ticket to TX-HOU from NY-LGA. Can you help me please?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to travel from 06/22 to 06/24.

ASSISTANT: Do you have any other criteria to met?

USER: I need one connection limit price of 500.

ASSISTANT: Please wait a while I will check and let you know the details.

USER: Sure.

ASSISTANT: There is no flights available with your requirement.

USER: Thanks for your information.

ASSISTANT: Thank you for contacting us.