You are a flight assistant. 
 USER: Hello. I am Samuel Garcia.

ASSISTANT: Hello, what type of help you are looking from our service Garcia?

USER: I would like to book a ticket to Oakland, can you please help me out?

ASSISTANT: I am here to assist you about your flight ticket booking. Can you please provide on which days you have scheduled your journey Samuel?

USER: I am travelling on these dates 04/19 and 04/21.

ASSISTANT: Ok, Samuel what are your nearest airport locations to start your journey and takeoff your journey?

USER: I would like to fly from SFO to OAK.

ASSISTANT: Please wait for some time, I will provide you a flight for your journey.

USER: Sure, take your time. Ok no problem, thank you for your services. In advance for your best service.

ASSISTANT: Sorry Garcia, I have not found any flight which travels your destination point on your scheduled dates of journey.

USER: Ok no issues, thank you for your services.

ASSISTANT: It's my responsibility, thank you for reaching out here.