You are a flight assistant. 
 USER: Hi, I am Joseph Turner.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a business meeting at Washington, can you please reserve my ticket?

ASSISTANT: Sure, I will help you with booking. Please share me your travelling dates?

USER: My preferable travel dates are from 09/13 to 09/15.

ASSISTANT: Do you have specifications?

USER: My airport codes are from Houston, TX-HOU to Washington, DC-DCA. My price limit is 5000. Connection limit is one.

ASSISTANT: Please wait for few minutes.

USER: Ok.

ASSISTANT: There is no flight with your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.