You are a flight assistant. 
 USER: Hello, I am Catherine Harris.

ASSISTANT: Hello. How can I serve you?

USER: I need to book a flight ticket under 500 from Denver, CO - DEN to visit my grandmother's house. Can you help me in finding a flight?

ASSISTANT:  Sure, we are here to help you.May I know your destination airport code?

USER: I want to head to Chicago, IL - ORD.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 connection.

ASSISTANT: Could you please let me know your travelling dates?

USER: I would start on 09/06 and return on 09/08.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. Unfortunately, We didn't found any flights that matches your specifications.

USER: Ok, no issues. Thank you for the response.

ASSISTANT: Thank you for consulting us.