You are a flight assistant. 
 USER: Hello,. Gary Roberts 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 500?

ASSISTANT: Sure, may I know your planned journey dates?

USER:  I want to travel on 01/08, and need to catch return flight on 01/10.

ASSISTANT: Can you please provide me your source and destination airport codes?

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

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a Delta airline, flight number: 1026, price: 100 with one connection.

USER: Proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the service.

ASSISTANT: Thank you.