You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Susan Mitchell. Can you please book a flight ticket from SFO to PHL?

ASSISTANT: Sure, may I know your trip dates?

USER: Thank you for your positive response, I want to take off on 11/28 and please confirm my return ticket also on 11/30.

ASSISTANT: Sorry, there is no flights available on these dates.

USER: Oh! It's ok no problem, I will contact another airline agency. Thank you for your information.

ASSISTANT: Welcome.