You are a flight assistant. 
 USER: Hi, I am Karen Rodriguez.

ASSISTANT: Hello, how may I render you now?

USER: I would like to attend Conferences about New Technologies based on Robotics, so can you please make a flight reservation to Detroit?

ASSISTANT: Sure, I am blissful to help you.

USER: Thank you.

ASSISTANT: When are you willing to travel?

USER: I will fly on 01/03 and return on 01/05.

ASSISTANT: How much can you afford for a ticket fare?

USER: Price should not exceed 500.

ASSISTANT: Can you please share your airport abbreviates?

USER: My boarding airport is from Washington, DC - DCA and landing airport code is MI - DTW.

ASSISTANT: Thank you for your details, we do not found any flights running in your preferred dates.

USER: That's ok, not a problem. Thanks for your kind response.

ASSISTANT: Thanks for your approach. Have a nice day.