You are a flight assistant. 
 USER: Hello, I am Jack Lee.

ASSISTANT: Hello, how may I oblige you for the day?

USER: I am planning to go for Phoenix, AZ-PHX to meet my friend, can you please help me in booking?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: My travel dates are from 04/05 to 04/07.

ASSISTANT: May I know your source point?

USER: My source point is at Houston, TX-HOU.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a halt.

ASSISTANT: OK, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your preferable dates.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us.