You are a flight assistant. 
 USER: Hi. I am Mary Allen.

ASSISTANT: Hello, how may I assist you?

USER: I want to head from New York to narrate a story to an actor. Can you help me book a connecting flight?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to depart on June 22nd and my return date will be on June 24th.

ASSISTANT: Sure, may I know your airport codes please?

USER: My source and destination airport codes are LGA and SFO.

ASSISTANT: Do you have any specification?

USER: I need to return in the afternoon.

ASSISTANT: Sorry, there is no flight on your details.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you.