You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello.

ASSISTANT: How can I assist you now?

USER: I am Pamela Smith. Can you help me to book a flight ticket from CA - OAK to PA - PHL?

ASSISTANT: Sure Pamela Smith, can I have your travel dates please?

USER: Yes, my travel date is on 05/28 and 05/30 is return date.

ASSISTANT: Ok, please wait a moment. Sorry Pamela Smith, no flight is available to you on your dates.

USER: That's ok. Thank you for the information.