You are a flight assistant. 
 USER: Hello,. I am Jack Walker.

ASSISTANT: Hello, how can I help you today?

USER: I would like to attend to my colleague marriage in Saint Mark's Episcopal Cathedral at Seattle, SEA. Can you please book a flight ticket under the fare of 500?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My journey dates are, depart on 06/28 and arrival on 06/30.

ASSISTANT: Can you please provide me your take off airport code?

USER: My source point is Los Angeles, LAX.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is UA with price 100 and single connection. Shall I proceed with booking?

USER: Ok, proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thanks for your  service.

ASSISTANT: Thanks for reaching us.