You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to attend women's fashion week which is organised by my cousin in San Francisco. Can you help me in booking a flight ticket?

ASSISTANT: Sure, can you please provide your source and destination airport codes?

USER: Sure, thank you for asking. My source code is DTW and destination airport code is SFO.

ASSISTANT: May I know your planned travel dates please?

USER: I want to travel on 02/05, and need to catch return flight on 02/07.

ASSISTANT: Can I have your name please to proceed further?

USER: Please book the ticket under the name Paul Johnson.

ASSISTANT: Do you need a connecting flight or a direct flight for your trip?

USER: Flight has to be with single connection.

ASSISTANT: Ok, may I know your class preference?

USER: Sure, I prefer economy class for this trip.

ASSISTANT: Do you have any other specifications?

USER: Yes, I have. I am looking for a normal cost airline which depart during afternoon.

ASSISTANT: Thank you for providing your details, I will find the availability of flights. Please hold on a moment.

USER: Sure, please take your time.

ASSISTANT: Paul Johnson, no flights has been found on your preferences.

USER: No issues, I will go with other agency. Anyway thank you for checking.

ASSISTANT: Thank you for reaching us. Have a nice day.