You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patricia Jones.

ASSISTANT: How may I help you?

USER: I would like to travel from BOS to HOU, could you help me out?

ASSISTANT: Sure, please share your travel date.

USER: My preferable dates are from 03/28 to 03/30.

ASSISTANT: Sorry, there are no flights.

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

ASSISTANT: Thank you for reaching us.