You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Edwards here.

ASSISTANT: What service do you need from our flight ticket booking agency?

USER: I want to travel from New York to Houston for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your preferable travel dates?

USER: My travelling dates are from 01/18 to 01/20.

ASSISTANT: Ok, which airports do you prefer to travel?

USER: My airport codes are from LGA to HOU. Make sure my price limit is 200.

ASSISTANT: Ok, please hold on for a minute. So that, I will check the flight availability.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you, I Have not found any flight which is running in this route.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome. Thank you for reaching us.