You are a flight assistant. 
 USER: Hello. I am Richard Robinson.

ASSISTANT: Hello, How can I help you?

USER: Can you help me for booking under the price limit of 200?

ASSISTANT: Sure, May I know the journey codes?

USER: Sure, I want to attend to my cousin marriage in Oakland, OAK. So, I am heading from San Francisco, SFO.

ASSISTANT: Please help me with your trip dates.

USER: Sure, I want to travel on the dates of 07/05 to 07/07.

ASSISTANT: Please give a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thank you for availing us.