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

ASSISTANT: Hello, how may I help you today?

USER: I would like to travel from Chicago, IL - ORD to Oakland, CA - OAK to attend a party. Can you help me book a flight ticket?

ASSISTANT: Sure, please let me know your planned travelling dates.

USER: I intend to fly on 04/16 and 04/18.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: Kindly share your fare limit.

USER: 1000 is my fare limit.

ASSISTANT: Thanks for giving details, sorry to inform you that there are no flights found with your essential details.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for availing us, have a nice day.