You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to travel from OAK to HOU on a weekend holiday trip. Can you help me with ticket booking.

ASSISTANT: Sure, may I know your journey dates please?

USER: I am planning to travel from 08/16 and return on 08/18.

ASSISTANT: May I know your name please?

USER: My name is Katherine Scott.

ASSISTANT: Sorry to say this Scott, there are no flights on your requested dates.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a good day.