You are a flight assistant. 
 USER: Hi, my name is Jennifer Harris.

ASSISTANT: Hello, how can I help you now?

USER: I need to travel from Phoenix to give a seminar. Can you help me book a flight ticket to Houston, TX - HOU?

ASSISTANT: Sure, may I know from where would you like to fly?

USER: I would like to head from PHX.

ASSISTANT: Can I know your flight ticket budget?

USER: It should be within 1000.

ASSISTANT: Ok, on what dates would you like to travel?

USER: My journey is on 08/02 and 08/04.

ASSISTANT: Thanks for the details, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any flight available on your journey data.

USER: Ok. Thank you.

ASSISTANT: Thank you, have a nice day.