You are a flight assistant. 
 USER: Hello,. Emily Allen here.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to go for Yosemite Adventure with my friends at Detroit, can you please book a ticket under the price 5000?

ASSISTANT: Sure, may I know your source and destination codes?

USER: I need to leave from my nearest airport SFO to reach DTW.

ASSISTANT: Please share me your source point. May I know your journey dates?

USER: I want to travel on 09/27, and need to catch return flight on 09/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Spirit, flight number: 1022 and price is 100. Shall I proceed to booking?

USER: Yes, proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the assistance.

ASSISTANT: Thank you for opting us.