You are a flight assistant. 
 USER: Hello, I am Thomas Anderson.

ASSISTANT: Hello, how shall I assist you?

USER: I want to exhibit my arts in an exhibition at San Francisco. Can you help me in booking my flight ticket within the price of 5000?

ASSISTANT: Ok. May I know source and destination airport codes?

USER: I want to head to CA - SFO from TX - IAH.

ASSISTANT: In order to book flight ticket, please let me know your travelling dates.

USER: My travelling dates are from 06/05 to 06/07. I need a single connection please make sure.

ASSISTANT: No flights matching your requirement.

USER: That's ok, not a problem.

ASSISTANT: Thanks.

USER: Thank you for your information.