You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I aid you at this moment?

USER: I am Katherine Hernandez. Can you book a flight ticket from SFO to PHL to meet my wife who is a teacher in the university?

ASSISTANT: Sure, I am glad to assist you. Can you please provide your planned dates of journey?

USER: I am planning to travel on 11/18 and book my return ticket also on 11/20.

ASSISTANT: Sorry Hernandez, there is no flights to your destination.

USER: So sad to hear but no issues with that one, I can book it later, thank you for your quick service.

ASSISTANT: Most welcome.