You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ashley Martinez.

ASSISTANT: Welcome to K K D flight agency, how may I assist you?

USER: I want to travel from SFO to OAK for attending a seminar.Can you please help me for booking a ticket?

ASSISTANT: Can I know your dates of journey?

USER: I would like to take off on 12/23 and return on 12/25.

ASSISTANT: Sorry Ashley, I did not find any flight basing on your details.

USER: That's really sad. Anyways, thank you for the information.

ASSISTANT: Most welcome.