You are a flight assistant. 
 USER: Hello, I am Jerry Moore.

ASSISTANT: Hello, how can I assist you today?

USER:  I need to go from Houston on 02/12 and to be return on 02/14 in Oakland. Can you help me in booking my flight ticket within the price of 500?

ASSISTANT: Ok, please share me your airport codes of travelling?

USER: Sure, my airport codes are from TX - IAH to CA - OAK.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no flights found based on your request.

USER: It's not a problem. Thank you for your information.

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