You are a flight assistant. 
 USER: Hello. I am Matthew Lewis.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a flight ticket to attend the Phoenix international autoshow , they are exhibiting more than 400 vehicles from many branded companies. Could you please help me in booking a flight ticket with fare 200?

ASSISTANT: Ok, I am glad to help you. May I know your journey points?

USER: My journey points are TX-DFW and AZ-PHX.

ASSISTANT: May I know your travelling dates?

USER: My depart will be on 06/01 and arrive on 06/03.

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

USER: Yes, I need a halt.

ASSISTANT: May I know your budget for ticket?

USER: I already mentioned above.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no flight found on your requested dates.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us.