You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Rachel Smith from Charlotte. I have to go to Oakland next week for attending a business meeting there. Can you please book a flight ticket from CLT to OAK?

ASSISTANT: Can you please share your journey dates?

USER: Thank you for your positive response, I want to take off on 12/12 and please confirm my return ticket also on 12/14.

ASSISTANT: Please give me a minute.

USER: Ok, take your time and find a best flight for me.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Oh! It's ok no problem, I will contact another airline agency.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you for your information.