You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am Charles Martinez, in this vacation I would like to travel on these dates 10/12 and 10/14?

ASSISTANT: Sure, May I know the journey codes?

USER: My journey codes are EWR to OAK.

ASSISTANT: Please give a moment.

USER: Ok, I will wait for your reply.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Thank you for reaching us.