You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight from Houston, TX - IAH to Oakland, CA - OAK. Can you please help?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I have planned this trip from 02/07 to 02/09.

ASSISTANT: May I know your good name?

USER: Sure, my name is Sharon Green.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.