You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Can you please book a ticket from DTW to SFO to attend for a live concert?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My scheduled dates are Apr 27 and Apr 29.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want single connected flight.

ASSISTANT: Any more specifications do you have?

USER: My return time is evening.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Please reserve on the name of Kathleen Garcia.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for approaching us, hope you have a great day.