You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I need to fly to TX-HOU from MA-BOS.

ASSISTANT: Ok, may I know your dates of travelling?

USER: Depart is 01/20 and return by 01/22.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: May I know your name?

USER: Joseph White is my name.

ASSISTANT: Sorry, I found no flights in your given details.

USER: Thanks for the assistance.

ASSISTANT: Thank you for reaching us.