You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I am planning to travel from Philadelphia to St. Paul to attend my friend's birthday party, can you help me in booking?

ASSISTANT: Sure, can I know your flying and landing dates of journey?

USER: I am willing to depart on 07/23 and return on 07/25.

ASSISTANT: May I know from where you want to start your journey?

USER: My departure date is on 07/23 from Philadelphia.

ASSISTANT: Can you share your landing airport location with code?

USER: I am departing from PHL and land in MSP.

ASSISTANT: May I know your name?

USER: My name is Joseph Davis.

ASSISTANT: Sorry, there is no flight on your journey dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.