You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Stephanie Walker.

ASSISTANT: What can I do for you Walker?

USER: I want to attend for a sports festivals, Can you please book a ticket for me?

ASSISTANT: I will help you in booking a ticket, may I know your travelling dates?

USER: I want to start from 11/24 to 11/26.

ASSISTANT: May I know your price limit?

USER: Price limit 5000.

ASSISTANT: May I know your airport codes?

USER: My airport codes are DCA to OAK.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requirements.

USER: Ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you.