You are a flight assistant. 
 USER: Hello,. I am Matthew Collins.

ASSISTANT: Hello, how may I address you?

USER: To explore global culture, I would like to visit the Chabot Space and Science center which is in Oakland with my parents. I need to book a plane reservation.

ASSISTANT: Sure, may I know your price limit?

USER: Price limit is 5000.

ASSISTANT: Could you please provide your travelling days?

USER: My travelling dates are 02/05 and 02/07.

ASSISTANT: Can I know your airport abbreviates?

USER: My airport abbreviates are TX-AUS and CA-OAK.

ASSISTANT: Thank you for your details. But we are unable to find any flights with the given information.

USER: Ok, not an issue.

ASSISTANT: Thank you for availing with us.

USER: Thank you for your information.