You are a flight assistant. 
 USER: Hello, I am Mark Wright.

ASSISTANT: Hello, how may I oblige you today?

USER: Could you please be my helping hand in booking a flight ticket from Dallas & Fort Worth, TX - DFW to reach Oakland, CA - OAK?

ASSISTANT: Sure, I will be your helping hand in booking a flight ticket.

USER: Thank you.

ASSISTANT: Could you please provide your preferred travel dates?

USER: My trip dates are 10/14 - 10/16.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us, hope to serve you again.