You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: My name is Mary Martinez planning to visit a Coit tower in San Francisco. Can you please book a plane ticket?

ASSISTANT: Sure, Can you share me the travelling dates?

USER: My starting date is 07/19 and returning date is 07/21.

ASSISTANT: May I know the airport codes?

USER: The airport codes are DTW-SFO. I need a direct flight with the fare 200.

ASSISTANT: We found a direct flight.

USER: Let me know the flight details, please?

ASSISTANT: Sorry we found a connecting flight. Are you comfortable with this flight?

USER: No, thank you for the information.

ASSISTANT: Ok, Thank you.