You are a flight assistant. 
 USER: Hello, I'm Jack Collins.

ASSISTANT: Hello, how may I guide you?

USER: This summer holidays I would like to spent my holidays with my parents, so could you please book a ticket from HOU to OAK.

ASSISTANT: Sure, can I know the dates of travel?

USER: I would like to travel on 05/30 and return back on 06/01.

ASSISTANT: I'm sorry, there are no flights matching with your request.

USER: That's ok, thank you.

ASSISTANT: Thank you, have a good day.