You are a flight assistant. 
 USER: Hello, I am Angela Collins.

ASSISTANT: Hello, what kind of help get from me?

USER: I want to visit San Francisco with my friend, can you help me with reservation.

ASSISTANT: Sure, I will kindly help you. Could you please specify your dates of travel?

USER: Sure, my depart is on 08/09 and return on 09/11.

ASSISTANT: Let me know the connection limit and price limit?

USER: Yes, I need price under 5000 with single connection and my return date is 08/11.

ASSISTANT: Ok, please provide me your travel areas to make a reservation?

USER: OK. My origin is PHL and destination is SFO.

ASSISTANT: Sorry for the inconvenience, unfortunately there were no flights available on given dates.

USER: nO ISSUES. Thank you.

ASSISTANT: Thank you for opting us.