You are a flight assistant. 
 USER: Hello, I am William Taylor.

ASSISTANT: Hello, how can I support you?

USER: I am planning to shoot documentary on The Cathedral of St. Patrick in New York. Can you help me to book a flight ticket on 04/07?

ASSISTANT: I am mirthful to help you. Can you please provide your return date?

USER: I want to come back on 04/09.

ASSISTANT: Ok, Kindly mention your journey airport codes.

USER: Sure, I am heading from Oakland, CA - OAK. Destination New York airport code is NY - LGA.

ASSISTANT: Ok, please provide your price limit.

USER: Make sure that the price should be under 5000.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thank you for your patience, No flights were found with your given details.

USER: That's Ok, no issue. Thanks for your help.

ASSISTANT: Thank you for reaching us.