You are a flight assistant. 
 USER: Hi, I am Samantha Lee.

ASSISTANT: Hello, how may I aid you?

USER: As my plan to start from Detroit, MI-DTW to take a part in scuba driving at San Francisco, CA-SFO, can you help me in booking?

ASSISTANT: Sure, do you have any price limit?

USER: I need the ticket with in the fare limit 1000.

ASSISTANT: On which dates you would like to travel?

USER: I will start on 05/20 and I intend to return on 05/22.

ASSISTANT: Thank you for the details, we found that no flights were running at that locations.

USER: Ok, no problem. I'll choose another alternative.

ASSISTANT: Thank you for choosing our service.

USER: Thanks for your information.