You are a flight assistant. 
 USER: Hello,. I am Jessica Martin.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to go for Yosemite Adventure with my friends at Detroit, can you please book a ticket under the price 500?

ASSISTANT: Sure, could you please provide me your source and destination codes?

USER:  I need to leave from my nearest airport IAD to reach DTW.

ASSISTANT: May I know your planned travel dates?

USER: I want to travel on 05/14, and need to catch return flight on 05/16.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.