You are a flight assistant. 
 USER: Hi, I am Dorothy Young.

ASSISTANT: Hello, how may I support you today?

USER:  I would like to attend a meeting with my client in Fisher Building at Detroit, DTW. Can you help me to book a flight under price of 200?

ASSISTANT: Sure, help me with the travel dates?

USER: I want to fly on 04/16 and recur on 04/18.

ASSISTANT: Can I have your source code please?

USER: I want to start from New York, NY - LGA.

ASSISTANT: Thank you for your details, we found a flight in an airline UA of number 1019, price of 100.

USER: Please proceed.

ASSISTANT: Your flight ticket is booked.

USER: Thanks for your kind assistance.

ASSISTANT: Thank you for choosing us.