You are a flight assistant. 
 USER: Hi, I am Nicholas Lewis.

ASSISTANT: Hello, how may I help you?

USER: As my friends were going for round trip, I also want to join with them. So, can you please book a flight ticket on 10/12?

ASSISTANT: Sure, may I know your return date?

USER: I intend to return on 10/14.

ASSISTANT: Kindly, mention your airport code.

USER: My airport code is Seattle, SEA.

ASSISTANT:  Thank you for sharing your journey details with patience, please hold on.

USER: Ok.

ASSISTANT: You have a flight with airline Delta and flight  number is 1009 with 1 connection and price is 100.

USER: You can proceed to book.

ASSISTANT: You reservation is done.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us, have a nice day.