You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Allen here.

ASSISTANT: Lisa, how can I assist you?

USER: Do you have any flight from SFO to PHL?

ASSISTANT: Please tell me your journey dates.

USER: I would like to travel on 11/18 and return on 11/20.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry, no flight is available for you as per your details.

USER: That's fine.

ASSISTANT: Thank you for choosing you.

USER: Thanks for your help and information.