You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: We friends were planning to go for a  tour to Denver, DEN on 09/15.

ASSISTANT: Sure, please share me your return date?

USER: Please help me to  book a ticket with the name of Alexander Adams. My return will be on 09/17.

ASSISTANT: Kindly mention me your source code?

USER: I have to fly from Atlanta, ATL.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: We found 1010 Spirit airline with single connection and price of 100. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you.