You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: Please book a flight from Oakland, OAK.

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Can you share me destination point please?

USER: Seattle, SEA is the destination, I need to go there to meet my fiance.

ASSISTANT: When are you planning to travel?

USER: I planned to travel on 08/25 to 08/27.

ASSISTANT: Do you need any halt in between your journey? May I know your good name?

USER: Yes,  I need to halt. I am Robert Clark.

ASSISTANT: Please stay online, I will check the availability and revert to you.

USER: Sure.

ASSISTANT: Sorry, we found no flights with your specification.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.