You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Larry Brown.

ASSISTANT: How may I assist you?

USER: I need to book a flight ticket from ORD to PHX, Can you please help me for booking?

ASSISTANT: Sure, I will help you. How much should be your ticket fare?

USER: I can pay up to 500.

ASSISTANT: May I know your depart date?

USER: My return date on 08/12.

ASSISTANT: Help me with your return date to proceed further.

USER: My return date is 08/14.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time. There are no flights found that matches your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.