You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you now?

USER: Can you please reserve me a flight ticket with the name of Shirley Nelson?

ASSISTANT: Sure, can you please specify me your airport points?

USER: My airport codes are from CA - OAK to TX - IAH.

ASSISTANT: Please provide me your travelling dates?

USER: My trip dates are 08/02 - 08/04.

ASSISTANT: Do you need any other requirements?

USER: I can afford up to 200 only.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that there is no flight found on your journey route.

USER: It's ok, thank you for your information.

ASSISTANT: Thanks for selecting us, have a nice day.