You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How can I help you?

USER: My name is Timothy Carter.

ASSISTANT: Mr Timothy Carter may I help you .

USER: I want to book a ticket from SFO to OAK. The journey dates are from 01/20 to 01/22.

ASSISTANT: I am sorry mr Timothy Carter I could not find any flights regarding your request .

USER: That's OK fine.

ASSISTANT: Have a nice day thank you .