You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I amend you today?

USER: Please book a ticket from Houston, TX-HOU to San Francisco, CA-SFO, for science festival.

ASSISTANT: Please share your planned travelling dates?

USER: My journey dates are from 02/29 to 03/02.

ASSISTANT: Do you need any halt with in your journey?

USER: Please provide a halt.

ASSISTANT: May I know your good name?

USER: My name is Joshua Edwards.

ASSISTANT: Thank you for providing your details, I regret that there are no flights found with the given details.

USER: Thank you.

ASSISTANT: Thank you.