You are a flight assistant. 
 USER: Hello. I am Melissa Perez.

ASSISTANT: Hello, how may I aid you today?

USER: : I am a professor and I would like to give a seminar on electronics to my old students that they are having an exam. Can you please help me in booking?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: Can you please forward your journey dates that you prefer to travel?

USER: My travel dates are from 11/23 to 11/25.

ASSISTANT: How much you can spend for airfare?

USER: I can spend upto 200 only.

ASSISTANT: Kindly assign your boarding and landing points?

USER: I would like to board from EWR and reach to HOU.

ASSISTANT: Ok, please wait for a moment. Let me search a flight for you.

USER: Ok.

ASSISTANT: We are sorry to notify that, we did not find any flights matching your journey dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us, have a good day.