You are a flight assistant. 
 USER: Hello. Kathleen Harris here.

ASSISTANT: Hello, how may I help you today?

USER: I want to travel from ATL to ORD to meet my grandparents over there, can you please reserve a flight ticket on those locations?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: Please share me your planned journey dates?

USER: Sure, my departure is on May 09 and please book my return ticket also on May 11.

ASSISTANT: Pleas mention your price limit for flight ticket?

USER: Sure, I can afford up to 500 for my journey.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.