You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I have planned to visit all the places in New York, so please help me in booking a flight on May 29th.

ASSISTANT: Sure, I am here to help you. Please let me know your name.

USER: Sure, my name is Joshua Johnson.

ASSISTANT: Thank you. May I know your source and destination airport codes?

USER: Sure, my airport codes are DTW - LGA.

ASSISTANT: Thank you. Please let me know your class preference.

USER: I am okay with any class.

ASSISTANT: Ok, do you also want me to book your return ticket?

USER: Yes, please book the return flight on May 31st.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: No issues, thank you.

ASSISTANT: You are welcome and thank you for choosing us.