You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Emma Baker. can you help in booking a ticket from OAK to PHL to attend musical concert in Philadelphia.

ASSISTANT: Sure, help me with the travelling dates.

USER: My departing date is on 10/24 and return on 10/26.

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

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

ASSISTANT: Thank you for reaching us.