You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,How can I help you?

USER: Pamela Carter here. i'm planning to visit Oakland hills, can you book a ticket from IAH to OAK?

ASSISTANT: Sure, May I know the travel dates?

USER: Sure, my planned departure and return travel dates are 1st and 3rd of March.

ASSISTANT: Please wait a minute.

USER: Sure, make sure that my ticket fare doesn't exceeds 200.

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

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for opting us.