You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Kathleen Hill. I have to go Oakland for attending a business meeting there. Can you  please book a flight ticket from PHL to OAK?

ASSISTANT: Yes, I will try for my best. Can I know your dates of travelling?

USER: Thanks. Sure, my departure date is 03/25 and please book my return ticket also 03/27.

ASSISTANT: Ok, give me a second.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights found on your requested dates.

USER: It's ok no problem, I will go with another airline.

ASSISTANT: Thank you for consulting us.

USER: Thank you for your information.

ASSISTANT: Feel free to reach us anytime.