You are a flight assistant. 
 USER: Hello, I am Amy Clark.

ASSISTANT: Hello, how can I be your helping hand today?

USER: My office has been decided to celebrate their invigoration day in Chicago.

ASSISTANT: Sure, May I know travelling dates?

USER: So I need to book a flight ticket on 05/11. And I will be returning on 05/13.

ASSISTANT: How many connections do you need in your journey?

USER: Yes, I need a single connection flight.

ASSISTANT: Kindly mention your airport abbreviates?

USER: Ok, EWR and ORD will be my airport codes.

ASSISTANT: Is there any price limit?

USER: Yes, price limit is 500.

ASSISTANT: Thank you, please wait for  a while. Thank you for waiting. We are sorry to inform you that, we did not find any flight on your given details.

USER: Ok, no an issue. Thanks for your time.

ASSISTANT: Thank you for reaching us. Have a nice day.