You are a flight assistant. 
 USER: Hello, I am Sarah Lewis.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to visit flower festival at Houston, TX - HOU. Can you help me in booking a flight ticket?

ASSISTANT: May I know the price that you can afford for a ticket?

USER: My price limit is up to 500 only.

ASSISTANT: Ok, on which dates you would like to travel?

USER: I want fly on 12/06 and return on 12/08.

ASSISTANT: Can you please ensure the source code of your journey?

USER: My origin is from San Francisco, CA - SFO.

ASSISTANT: Do you need a stopover in your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please hold on for a minute.

USER: It's ok, I will checkout with the another airline.

ASSISTANT: Sorry for the inconvenience, we did not found any flights on your preferred dates.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.